Illinois "Chalmers" model

[Bob K]

Hello All, I am in need of a mainspring for a Illinois PW, Chalmers model, ID #298708. I can't seem to find any information on it. Can anyone help me to get a spring or at least get the proper dimensions of it?
Thanks Bob K

[Bob K]

Sorry All, I forgot to mention that this is a 18S and keywound. Bob K

[bernie levine]

Sorry All, I forgot to mention that this is a 18S and keywound. Bob K

Hi Bob,

This may be of some help:

Cas-Ker Co.
2550 Civic Center Dr.
P.O. Box 31167
Cincinnati, Ohio 45231-0167

Call 1 800 487 0408
Fax 1 800 487 5848

When you contact them furnish them with the make and ser# of
your watch.

[bernie levine]

Sorry All, I forgot to mention that this is a 18S and keywound. Bob K

Hi Bob,

This may be of some help:

Cas-Ker Co.
2550 Civic Center Dr.
P.O. Box 31167
Cincinnati, Ohio 45231-0167

Call 1 800 487 0408
Fax 1 800 487 5848

When you contact them furnish them with the make and ser# of
your watch.

They also have a web site: www.casker.com

[BrianC]

Bob K.
The book says your watch is an 11 jewels, Model 1, grade 99 or 99s, circa 1887.
I have a mainspring for it if you still need one, e-mail me.
Brian C.