T. D. 103 Hamilton Watch Company LANCASTER,PENNSYLVANIA SUBJECT: Semi-Friction Balance Jeweling NOTE: This type of balance jeweling will be found in grades 986A, 987 987E, 987F, 989 and 912. Fig. 1, shows a cross-section of the movement through the center line of the balance. This drawing represents the balance bridge, pillar plates, hole jewel and […]

7-29 1000-1-30-31 1000-5-25-35 1000-6-15-36  Revised 1000-4-25-38 1000-9-27-39 Hamilton Issued about 30 technical documents (TD’s) prior to WWII. I plan to use post each one in a readable format. Age rendered the TD’s difficult to read and understand.  Grades 989, 989E, 995, 995A, 997, 980, 980A, 980B, 982, 987A are jeweled by an improved system, absolutely

Hamilton issued about 30 technical documents (TD’s) prior to WWII. The company released one each time they produced an innovation. I haven’t found the entire series. I’m guessing from the titles that a later TD caused Hamilton to revoke a previous one. For example, we haven’t found TD 105 & 106.  If we find those sheets, we’ll

In 1936, the Franklin D. Roosevelt administration published economic information that indicated the country had regained levels of employment similar to those of the late 1920’s prosperity. What would one expect during an election year? With all of Roosevelt’s hype, during his fireside chats, what would a company like Hamilton do? Hamilton toyed with the

I started collecting Hamilton watches in 1985. My dad, a third-generation jeweler, provided me with much of the information about the Hamilton watches I collected. I usually consulted him before I purchased a watch. My family’s jewelry stores sold various watch bands for several decades. Once, I  overheard a conversation among family members about Hamilton