I have as generic submariner style (solid screw on back and screw down crown) case I purchased from eBay (seller rouhelena) that currently is rated at 5atm. I've been thinking that I'd like to increase that to the point that it would be safe to swim with it. I realize I probably won't get it to the point of being able to dive with it, but swimming it just fine.
So, I've been looking over the case and it seems two simple things I can do are:
1. Replace the case back gasket with a higher quality gasket that fits better.
2. Seal the crystal with a bead of GS Hypo cement
That leaves the crown. I'm not sure what I can with it. The crown does have a gasket but I think the bigger question is the crown tube.
Any suggestions or anything else I should consider?