Hey guys, I need info on Elgin serial number P787350, Says Elgin USA on the movement. Thanks

The letter "P" would equal 52, so your whole serial number would be 52787350 for watches made in 1952. I have Ehrhardts Elgin book with serial numbers, but it only goes up to SN 50,000,000. Hopefully the 'Elgin site' will be up again and maybe it will give you a grade number, Cecil.