Hello every one i bought another Illinios. serial 3044027. At a guess Model 7 grade 305? i know it is 17j double roller with broken roller jewel. thanks Francis

Good guess! Made in 1916 in a run of 600, a total of 148,090 made.

Regards,
Bob

Thanks Bob Appreicated....

Can some one inform me to the part number for the Roller Jewel for a Double Roller for this model,or the size please. I looked at the Illinios part numbers i have, and It only tells me the Prt No of the Roller with the Jewel. Plus also what is the difference between a Double Guard and a Double Impulse Escapement.... Thanks

Francis-
The part # is 22. This jewel was used in 16s and 18s watches. Hope this helps!

Regards,
Bob

OK Bob thanks but any idea of how many mm's.... D shape..... Does any one else how the difference between the Double guard and the double impulse????? may have to put this question in the main PW section....