Hi everyone, I've had this speedy for a while, and from my limited understanding, maybe the pushers and crown are service replacements? But I am not super familiar with the nuances. Can a non flat foot crown possibly be correct on this reference? Considering to source a crown if this one is a replacement. Also, I've always had it on a deployment and this modern Omega strap, which I love, but obviously it's not period correct, if I do go for vintage look, what's the "proper" buckle style and size? thanks!