I HAVE AN INVICTA PROFESSIONAL AUTOMATIC MODEL 3744 GIVEN TO ME BY MY SON.HOW DO YOU SET THE TIME ON IT? DOES THE STEM PULL OUT TO SET OR DOES IT UNSCREW? THANS

I was not able find information on your specific model; only 2010 models seem to be listed on the website.

Instruction Manual for Invicta watches:

http://www.invictawatch.com/support_files/instruction_manual/Manual-HiRes.pdf

Go to page 8 of this file to identify the instructions for your watch. For most watches the crown pulls out for setting either to postion 1 or position 2.

Some Invicata watches do have Screw Down Crowns but this would be most likey on a Diver model, to help prevent water infiltration. In order to adjust the date and/or time on such a watch, you must first unscrew the crown before you can gently pull it out to its first or second click stop position. To do this, simply rotate the crown counterclockwise until it springs open. When you have finished setting the watch, the crown must then be pushed in and screwed back in tightly. Not doing so will cancel the water resistance of the watch and will void all warranties from the manufacturer.