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Hi all, I'm new to the forum and am sure I'll be learning a lot. I recently purchased an old Omega Seamaster from a well known auction site. I took a bit of a gamble, it looked in a right old state with a cracked crystal, broken bracelet, covered in crud and with a slightly pitted dial. The reason I purchased it was I have never owned an Omega and always wanted an older style that could be restored. This one looked as if it had never or hardly ever been opened, and thus serviced. It has a 562 movement housed in a 166.003 case and with a crosshair dial. In taking the back off, the gasket was an off white colour and as hard as rock, it must have been the original. The movement initially looked to be clean but the rotor does need attention - to be expected I suppose as the watch is from 1966 according to the serial number. I've removed the old gasket, the easiest way was to pop out the crystal first, just used my thumbs for that, then I warmed up the case in hot water for about ten minutes, this softened the gasket enough to insert an old screwdriver to carefully remove the gasket in sections. I removed the steel bezel using a razor blade and gently pushing the blade between the bezel and case and using a rotating action, it popped off nicely. Lots of crud under that. I've given the case an ultrasonic clean and light polish ready to receive a new crystal. My question is this: I have sourced from Cousins a new crystal, PZ1543L, for the 166.003 case. Is this to be inserted with a press tool or by using the crystal lift/insert type?