18s mvt ID

[garyg]

Is ‘‘this an Illinois movement?
Thanks in advance

 

[Bila]

Is ‘‘this an Illinois movement?
Thanks in advance

View attachment 754583 View attachment 754584 View attachment 754585

no, Hamilton.

 

[musicguy]

Hamilton Private Label
Hamilton Pocket Watch: Serial Number 284604 (Grade 924)




Rob

 

[James Wrobel]

That's a unique regulator. I never saw one like that before.
jjw

 

[Steven Thornberry]

That's a unique regulator. I never saw one like that before.
jjw

It's a regulator patented by William Goldthwait.

US427072

 

[179]

It's a regulator patented by William Goldthwait.

US427072

Used on many thousands of 18s Hamilton watches, with a few exceptions over a period of years.

 

[garyg]

Hamilton Private Label
Hamilton Pocket Watch: Serial Number 284604 (Grade 924)




Rob

Thank you very much
Do you know mainspring size
Thanks again

 

[Dave Coatsworth]

The grade 924 uses the #15 mainspring.