Corrected information - Waltham identification needed.

[Bruce_M]

I have a Waltham pocket watch with a serial number of 5,450,020 It is either a 14 or 16 size and it is stem set and 7 jewel count movement. American Waltham Watch Co and safety pinion are engraved on the movement. What model movement is this and what mainspring number would be correct? Dis Waltham make an unbreakable mainspring for this model in later years? What is the power reserve? Thank you.

[Bruce_M]

I have a Waltham pocket watch with a serial number of 5,450,020 It is either a 14 or 16 size and it is stem set and 7 jewel count movement. American Waltham Watch Co and safety pinion are engraved on the movement. What model movement is this and what mainspring number would be correct? Dis Waltham make an unbreakable mainspring for this model in later years? What is the power reserve? Thank you.

[Steven Mercer]

Bruce

Serial number 5,450,020, is listed in the Waltham Pocket Watch Identification and Price Guide as a Model 83, Sterling grade, 18 size watch.

Steve