I know I've seen what the letter after the number means can somebody refresh my mind thanks Mark

as far as I can read the series # is 48752 could this be correct?

Thanks for your reply my 307 is a right handed version from what I have read it was available in left I did find a schematic they are out there not sure of the date numbers are hard to read gotta find my magnifying glass LOL

Just recently purchased a #307 reel thanks for having just a great website.1st question was the 307 just a variant of the 300 series reel,2nd where can I get a schematic for the reel, other than Ebay are there any other places to get parts? Thanks again Mark