MERITAS Mainspring for 12s Hampden #7696 - Steel

MERITAS Mainspring for 12s Hampden 15j & 17j movements, Factory No 7696 (evidently the Meritas number was 3008), steel, new in envelope. Be aware that this is not the proper strength for lower jeweled models. I specialize in hard to find watch parts and all watch parts are unconditionally guaranteed. Images do a pretty good job of representing the item.