Hello, I recently acquired a Stanley #1 plane. I am looking for advice: 1) how can I date it, and 2) should I flatten the sole, which currently is rusty, but not deeply pitted, and 3) how much restoration should I do, e.g., use electrolysis to remove rust on the body and blade, repair chips on tote. Thank you for your advice. Tom
1. https://woodandshop.com/identify-stanley-hand-plane-age-type-study/ is quite helpfull usually
2. It depends. If you're going to make it a user, then go for it.
3. Evapo-Rust is my go-to for rust removal, it is safe to use and it does a very good job.
All in all, Stanley #1 is a very collectable hand plane, all things you do for it, will lessen its value. But, if you gonna make it a user for yourself, do whatever you need to make it functional. Thick glass plate is good base to put some 80-120 grit sandpaper on, for flattening of the sole.