There is a 0.05mm difference between the diameter of the mainspring for 7S26C, etc. and 7S26A 7S26B 7S25B 7S35B 7S55 or 7002 7005 7006 7009 7019 7S36, but this would be closest winder available.

The fork will stop the mainspring from being pulled out while removing the crank.

Only 5 available.