Here's my collection. All are mechanical autos.
Left is a Fortis Flieger that's my daily. On the winder, it's accurate to about a second per day. On the wrist, 2-5, depending on what I'm doing. The ETA 2428-2 inside is bulletproof. It's among the last of the watches with painted tritium hands and dials.
Center is a Fortis Marinemaster Supercompressor from the early 70s. It's a rather intriguing piece of machinery - it's supposedly water resistant to pretty decent depth despite the non-screw crowns because of a neat gasket design. Movement is an ETA 2783 and dial and hands have the originial tritium-based lume that still dimly glows. The dial is supposedly the decompression diving tables, and the crystal is a huge dome. It's currently on a shark-mesh band. I wear this sometimes when I dress up.
Right is a Seiko 6309-7040 from the mid-80s. Original ones are worth some money. This one has an aftermarket dial and hands, and come to me from the Philippines via eBay. I dive, sail, ski, and everything else with this thing. The only issue I've had so far involved jumping in to a hot tub on a -20degF day. The seals didn't like that one too much. Otherwise, it's been completely reliable and drama-free.
As for winders, I have one of the cheap Versa winders off of Amazon. It seems to work rather well, but I don't think it would have the balls necessary to wind the Seiko. The Fortis(es?) are fine on it.
*edit* One of the most entertaining things about a well-regulated mechanical auto is that it's going to be more accurate than your computer or phone if it's not updated regularly. To keep track of the watch's performance, I have to use time.gov to get an accurate fix.
