How do I set the time on an old Regina pocket watch. I can wind it and it runs well. The piece to wind the watch does not pull in or out to set the hands.
If you can wind your pocket watch using the crown, but you cannot see any way of setting the watch, you probably have a "lever-set" movement, though it's possible you might also have a "pin-set" movement. Do you see a little button you can push in, either at 1-2:00 or 10-11:00 on the watch case? If you, you have a pin set watch. Push and hold that little button in while you twist the winding crown, and that will let you set the time. End of problem.
Setting the time on a lever-set watch is a bit more complicated and will require taking off the front bezel of your pocket watch--the metal ring that holds the watch crystal in place. Pocket watch cases of this time are usually made in 3 pieces: the bezel, the main case body, and the back. The procedure used to remove your bezel depends on the type of watch case you have.
Take a close look at the front of your pocket watch. Do you see any hinges at the bottom (that is, below 6:00 and where the bezel meets the main case body)? I suspect that you won't, as double-hinged cases are usually associated with an older style of pocket watch, but it's worth checking. If you do see little hinges for the FRONT (it's more likely that the back will be hinged), then look for a little lip on the bezel that's used to pry open the front. Pull on that to open the case.
If you don't see hinges, which is what I expect, your front bezel unscrews. You can try to do this with your bare hands, but it's a lot easier if you have a bit of "gripping" rubber so your hands don't slip so badly. I have a small rectangle of shelf non-slip stuff that works perfectly for this. Turn the bezel counterclockwise. It may resist a little bit at first due to accumulated dirt, but then it should easily screw off.
Once you have the bezel away from the face, look closely at about 2:00 on the watch dial. Just at the edge of the dial, you should see a little lever or button. GENTLY pull this away from the watch face until it stops. Now, when you turn the winding crown, you should be able to set the time. Once the time is set, gently push the lever back to its prior position. Now, you should be able to wind the watch without changing the time.
Be very careful when screwing the bezel back onto the watch body. These parts typically have very fine threads, and it's easy to cross-thread the pieces. Don't force the two pieces together; once the threads catch properly, the front bezel will screw on easily without resistance.
An older style of pocket watch required the use of a little key to set the time from the back of the pocket watch movement. However, these watches were also wound by the same key, so the fact that you're able to wind this watch with a crown suggests to me that your watch doesn't use this system.