Hello:
I have a Waltham 8 day 15J Deck watch/clock and I am hoping that someone can give me the part numbers for 1) mainsprings and 2) Balance staff.
The serial # is 18,073,411.
Thank you in advance,
Grant

The balance staff carries Waltham P/Ns 28210 (1.24mm staking shoulder), 28212 (1.45mm staking shoulder for small balance), or 28213 (1.30mm staking shoulder for smallest balance - 12s diameter).
The mainspring is P/N 2232, measurements are 4.50 mm x .23mm x 30" length (Dennison 37 1/2 x 1).
BTW, I've foumd it advisable to alway replace the mainsprings in pairs, as the unreplaced spring tends to break when used with a new spring.

Good to see you back posting Grant.
I missed you.
Maybe when you have time you could post some photos of this clock.

Thank you Ed for the info. Much appreciated.
Thank you for the welcome Kevin.... Hopefully I can find more time to spend on this great site!
Happy holidays!
Grant