NEW Vintage Sandsteel Mainspring for Hamilton 
w/ back case Watch 18/0 sz  No.- 2721

this is a piece of history.  If you fix old watches you are in luck. 

I am not an expert on watches. I bought a big lot of old watch parts from a family watch-repair business that went to auction.  They had been in business for 100 years.  

PLEASE - check out my other vintage watch parts we will be listing more over the next number of months. I will give you a deal if you want multiple orders!!  

FREE USA SHIP