I recently purchased an Omega Seamaster 2220.80 on a steel bracelet (1503/825). Because it is getting warmer outside I am considering putting it on a NATO Strap. It seems easy to take the bracelet off, but I would like to purchase spare spring bars in case something happens while taking the bracelet off. Otto Frei (Genuine Omega Spring Bars) has some 20mm spring bars, OME-SPRING-BAR-03 and OME-SPRING-BAR-04. Are these the correct spring bars? Is there a difference between the spring bars for the bracelet versus a strap? Can one use the bracelet spring bars on a strap?