Vintage 1970s Hamilton Wristwatch

Brand: Hamilton Style: Vintage Wristwatch, Winding mechanism (still working & telling us the time just in a different Era) - 826409 10k RGP BEZEL w/ Stainless Steal Base (Engraved) No personalization engravings on this watch. History: This was my grandmothers watch. Has been in my jewelry box for years. No additional maintenance has been done to the watch because of this. Will need a profession or expert cleaning I’m sure. Willing to work on price however watches with personalized engravings are selling for upwards to $300 and this is a blank slate.