Mainspring non automatic 1,70 mm x 0,13 mm x Ø 11.5 mm by size for some calibres off: AS, MST, Roamer, Unitas 6310, Unitas 6410,

Mainspring non automatic 1,70 mm x 0,13 mm x Ø 11.5 mm by size for: AS 137, AS 277, AS 615, AS 1195, AS 1399, AS 1573, G. P. 03, MST 402, MST 428, Unitas 171, Unitas 175, Unitas 176, Unitas 177, Unitas 178, Unitas 179, Unitas 203, Unitas 204, Unitas 205, Unitas 206, Unitas 207, Unitas 212, Unitas 220, Unitas 222, Unitas223, Unitas 224, Unitas 227, Unitas228, Unitas 229, Unitas 230, Unitas313, Unitas 314, Unitas 376, Unitas 500, Unitas 6310, Unitas 6311 Unitas 6312, Unitas 6315, Unitas 6316, Unitas 6317, Unitas 6410, Unitas 6412, Unitas 6415, Unitas 5417, Unitas 6599