Hi All, the mainspring in my 16s 23j Ball Illinois went "BOING". Can someone please let me know what replacement mainspring is correct for use in this watch. I get the feeling Deacon will know....... thanks in advance all! Joe

How about a serial number?

Hi Joe, I wish I did know for sure but I believe an Illinois spring for the non 60 hour 23j 16s Bunn Special will work. I had a 23j Ball Illinois but the spring was fine so I never replaced it. Someone here will know as this club has some very erudite members who know a great deal more than I do. Good luck and we will all learn something when we get the answer to your excellent question!

Hi David, the serial # is B800130 hope you can tell me. THANKS IN ADVANCE

That is a Grade 810, Model 11 Movement which is P/N 47327 according to Swigart

David, thank you very much for your time!!! Joe

This is a Part#1954 I Think. I usually measure the old spring and match the new that way just to make sure.

Next question.... would someone page have a 16s Illinois mainspring pt# 47327 for sale? If so please let me know... regards Joe

Hi Dave, I'm confused but thats OK. If anyone has one for sale I would appreciate it. thanks

Joe, actually that is a 60 Hr. Motor barrel spring. I have an extra one you can buy. Send a $25.00 paypal donation to ihc185@roadrunner.com and send me your address at david@glopar.com