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Enter the serial number from the pocket watch movement below. Do not use the case number. Tips for looking up your watch

How to Find Info About Your Pocket Watch

The Pocket Watch Database has compiled data covering the major American pocket watch manufacturers and created an easy way to find information using the serial number on the watch movement. Here are a few tips to find information about your pocket watch:

  1. Always input the serial number from the pocket watch movement (the "guts" of the watch).
  2. Never use the serial number from the case or any other part.
  3. If the serial number includes a letter, enter it along with the number when using the lookup feature.
  4. Many pocket watch case backs screw off. Others may require a dull wide blade to pry or pop the cover. Be careful not to scratch or damage the movement.
  5. Always select the correct manufacturer, which is usually stamped on the watch movement.
  6. If the manufacturer is not listed on the site, you may have a "private label" watch or it may not be American-made.
  7. Understand that many companies did not keep accurate or complete records. As a result, information displayed on this site may have inaccuracies. This is to be expected, and we have included an option to report inaccurate information on the result pages so the database can be continually improved.
Pocket Watch Serial Number Lookup - Hamilton, South Bend, Illinois, Rockford, Waltham & Elgin Pocket Watches
  Serial Number:
Need to replace a watch crystal? Use our new crystal size guide to find the proper fit.

E. Howard Watch Co. (Keystone) Pocket Watch Patents

The following gallery contains patents that were issued or assigned to E. Howard Watch Co. (Keystone) or individuals known to be associated with the company at the time. Not all designs were fully implemented into production.

Watch Stem Wind & Set

Patent Number:781263
Description:Watch Stem Wind & Set
Inventor: Olof Anderson
Patent Date:Jan 31, 1905
Registration Type:Patent

Watch Balance

Patent Number:788399
Description:Watch Balance
Inventor: Joseph Alexander Freund
Patent Date:Apr 25, 1905
Registration Type:Patent

Watch Stem Wind Mech

Patent Number:796162
Description:Watch Stem Wind Mech
Inventor: Ryland L. Taft
Assignee:E Howard Watch Co
Patent Date:Aug 1, 1905
Registration Type:Patent
Sample Image:

Watch Barrel

Patent Number:886387
Description:Watch Barrel
Inventor: Walter B. Mehl
Assignee:Howard Watch Co
Patent Date:May 5, 1908
Registration Type:Patent
Sample Image:

Machine Staff Lathe

Patent Number:889386
Description:Machine Staff Lathe
Inventor: Walter B. Mehl
Assignee:E Howard Watch Co
Patent Date:Jun 2, 1908
Registration Type:Patent

Watch Movement

Patent Number:900183
Description:Watch Movement
Inventor: Walter B. Mehl
Assignee:E Howard Watch Co
Patent Date:Oct 6, 1908
Registration Type:Patent

Watch Case

Patent Number:922013
Description:Watch Case
Inventor: Walter B. Mehl
Assignee:E Howard Watch Co
Patent Date:May 18, 1909
Registration Type:Patent

Watch Case Bow

Patent Number:971053
Description:Watch Case Bow
Inventor: Bernard Levy
Assignee:Keystone Watch Case Co
Patent Date:Sep 27, 1910
Registration Type:Patent

Watch Movement Ratchet Mech

Patent Number:971496
Description:Watch Movement Ratchet Mech
Inventor: William Henry Ebelhare
Assignee:Keystone Watch Case Co
Patent Date:Sep 27, 1910
Registration Type:Patent
Sample Image:

Watch Movement Ratchet Mech

Patent Number:971500
Description:Watch Movement Ratchet Mech
Inventor: Howard Metzler Groff
Assignee:Keystone Watch Case Co
Patent Date:Sep 27, 1910
Registration Type:Patent

Watch Movement Ratchet Mech

Patent Number:977286
Description:Watch Movement Ratchet Mech
Inventor: William Henry Ebelhare
Assignee:Keystone Watch Case Co
Patent Date:Nov 29, 1910
Registration Type:Patent

Watch Movement

Patent Number:977320
Description:Watch Movement
Inventor: Walter B. Mehl
Assignee:Keystone Watch Case Co
Patent Date:Nov 29, 1910
Registration Type:Patent

Watch Movement

Patent Number:977321
Description:Watch Movement
Inventor: Walter B. Mehl
Assignee:Keystone Watch Case Co
Patent Date:Nov 29, 1910
Registration Type:Patent

Watch Movement End Stone Cap

Patent Number:978612
Description:Watch Movement End Stone Cap
Inventor: Walter B. Mehl
Assignee:Keystone Watch Case Co
Patent Date:Dec 13, 1910
Registration Type:Patent
Sample Image:

Watch Barrel

Patent Number:978613
Description:Watch Barrel
Inventor: Walter Bird Mehl
Assignee:Keystone Watch Case Co
Patent Date:Dec 13, 1910
Registration Type:Patent

Watch Movement Pallet End Stone Cap

Patent Number:981667
Description:Watch Movement Pallet End Stone Cap
Inventor: Walter B. Mehl
Assignee:Keystone Watch Case Co
Patent Date:Jan 17, 1911
Registration Type:Patent
Sample Image:

Watch Wind Indicator

Patent Number:992118
Description:Watch Wind Indicator
Inventor: William Henry Ebelhare
Assignee:Keystone Watch Case Co
Patent Date:May 9, 1911
Registration Type:Patent

Watch Pendant Bow

Patent Number:D41552
Description:Watch Pendant Bow
Inventor: Fritz Mink
Assignee:Keystone Watch Case Co
Patent Date:Jul 11, 1911
Registration Type:Patent

Watch Case

Patent Number:998792
Description:Watch Case
Inventor: Fritz Mink
Assignee:Keystone Watch Case Co
Patent Date:Jul 25, 1911
Registration Type:Patent

Watch Stem Wind & Set

Patent Number:1013896
Description:Watch Stem Wind & Set
Inventor: Earle Sloan Perry
Assignee:Keystone Watch Case Co
Patent Date:Jan 9, 1912
Registration Type:Patent

Watch Bridge Plate -edward Howard-

Patent Number:D42574
Description:Watch Bridge Plate -edward Howard-
Inventor: Joseph A. Freund
William H. Ebelhare
Assignee:Keystone Watch Case Co
Patent Date:Jun 4, 1912
Registration Type:Patent
Sample Image:

Watch Stem Wind & Set

Patent Number:1029116
Description:Watch Stem Wind & Set
Inventor: Joseph A. Freund
Assignee:Keystone Watch Case Co
Patent Date:Jun 11, 1912
Registration Type:Patent
Sample Image:

Watch Movement

Patent Number:1041335
Description:Watch Movement
Inventor: Granville Nutting
Assignee:Keystone Watch Case Co
Patent Date:Oct 15, 1912
Registration Type:Patent

Banking Pin

Patent Number:1062645
Description:Banking Pin
Inventor: Joseph A. Freund
Assignee:Keystone Watch Case Co
Patent Date:May 27, 1913
Registration Type:Patent

Watch Movement

Patent Number:1063251
Description:Watch Movement
Inventor: Joseph A. Freund
Assignee:Keystone Watch Case Co
Patent Date:Jun 3, 1913
Registration Type:Patent

Watch Movement

Patent Number:1084215
Description:Watch Movement
Inventor: Erik A. Lundvall
Assignee:Keystone Watch Case Co
Patent Date:Jan 13, 1914
Registration Type:Patent

Watch Display Box

Patent Number:1346591
Description:Watch Display Box
Inventor: Wilbur C. Cook
Assignee:Keystone Watch Case Co
Patent Date:Jul 13, 1920
Registration Type:Patent

Device Stem Wind & Set

Patent Number:1378408
Description:Device Stem Wind & Set
Inventor: Joseph A. Freund
Assignee:Keystone Watch Case Co
Patent Date:May 17, 1921
Registration Type:Patent

Watch Thin Movement

Patent Number:1392006
Description:Watch Thin Movement
Inventor: Joseph A. Freund
Patent Date:Sep 27, 1921
Registration Type:Patent

Watch Plate Mfg

Patent Number:1392007
Description:Watch Plate Mfg
Inventor: Joseph A. Freund
Patent Date:Sep 27, 1921
Registration Type:Patent

Watch Wind Mech

Patent Number:1467427
Description:Watch Wind Mech
Inventor: Joseph A. Freund
Assignee:Keystone Watch Case Co
Patent Date:Sep 11, 1923
Registration Type:Patent

Watch Wind Device

Patent Number:1499609
Description:Watch Wind Device
Inventor: Joseph A. Freund
Assignee:Keystone Watch Case Co
Patent Date:Jul 1, 1924
Registration Type:Patent