Set lever screws #5443 for many Swiss manufacturers and calibers for Swiss wristwatch movements. See pics and drop down list for calibers available. Many to choose from. Manufacturers represented in this listing are below: ARO(Arogno) AS(A Schild)DUR(Durowe)EB(Bettlach) ETAFEF(Fleurier)FEL(Felsa)FHF(Font)PES(Peseux) UT(Unitas)All screws are new old stock and you will get 2 per order taken from the packaging shown in the pics.Select your needs form the drop down list above.The screws for the different calibers in this listing are not interchangeable with other calibers in this listing although there may be interchangeability in caliber groups. Please consult your caliber data to figure out interchange. You are responsible for any assumption of interchange of parts between calibers. Ask questions before you buy.Thank you for looking!