I posted this “dive” watch in another forum but am hoping there are other endura collectors. They made some cool perpetual watches with a nice look, too. Please show your Endura watch. These are inexpensive, often one jewel pieces that sold in Sears or Penney’s catalogs in many cases. After 24 hrs, this one jewel wonder lost about 20 seconds, and I am certain it has never been serviced and probably never regulated. That was on the wrist.