Hi I am new to the board. I found a 23j sangamo at a second hand store. The seller could not get it to time. It runs but depending on where the pendent is it will runn 20 min fast or 2min slow. When I got it apart I found the balance had 3 types of screws in it. I have been looking for a grade 1 balance because I will have to change out all the screws. Does anyone know where I can find a Grade 1 balance part number 5066-1500 as listed in the December 1923 catalogue.

Try the Griffin Watch Co. (603) 641-9225. The hours are Tuesday through Thursday 9:00 am to 4:00 pm.