BESTFIT stems (4) for Zaria caliber 1509 - new in envelope

Lot of 4 BESTFIT stems for Zaria caliber 1509 movements and perhaps others as well, new in unsealed envelope. #1567 from the Bestfit 200 system for stems, see images for further details. Envelope originally had 3 but now it has 4, which is the opposite of what usually happens with these. Also envelope says caliber 1500 but Zaria in the USSR didn't have a caliber 1500 so it's got to be 1509.  I specialize is hard to find watch parts so I usually have whatever you might need, all watch parts are unconditionally guaranteed and offers are welcome. Images do a suitable job of representing the item.