Those casebacks held down by screws can be a nightmare to remove. The screws heads get damaged from using the wrong driver, or over tightened and impossible to remove.Screw back are more water resistant.
Don't know of any snap-in backs.
Know of screwed down with bolts as opposed to rotating the back screw down.
I won't buy a snap on back, unless it's a vintage watch.
The advantage of a reissue is the O-ring should be readily available. When work is needed a skilled watchsmith should have the proper tools and skills, to not scratch the back with the caseback knife and evenly press the back on again. But there is always a chance the blade will slip and scratch the back. I've worked on several and some have the smallest slot to get the tip in.
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That's why the back needs to be pressed in flat and even pressure. Also, if done wrong/to quickly the crystal can crack. I know I've been through the learning curve. I bought a bag of watches from goodwill to practice with.
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