Skimmerreplacement - pool from 1972

I need to replace my skimmer ad is looking for a replacement.

Pool is made of glassfiber.

has an item no 8650-17 and a marking off patent 3067879.

Any suggestion for a replacement which fits the inlet ?

Forgot to state that inlet is 262 mm *196 mm (10 5/16" * 7 3/4 ")

I don’t think you will find an exact replacement, but the Hayward Skimmer,wide Track,1.5"" Fip,square Wg (sp10852) might work for you.  Check out Hayward’s sales sheet on the SP1080 Auto Skim Wide Track series to see which one has the specifications that meet your needs the best.