Thoughts on my recent purchase / crown help

Good evening all just recently picked up this seamaster f300 chronometer at what I believe a very good price. I think it's all genuine Dial/ crystal with logo in the centre and case in good condition maybe slightly over polished as this should be brushed?? . My question is the crown I'm trying to find an original or anything close the case number is 198.001 but looks like 199.001 could be my eyes lol. If anyone knows a part number etc would be much appreciated. If anyone has any information what this Crown was originally off would be cool or what you think about it if I should leave it or change it. Thanks

Perfect thankyou. Yea I'm pleased with it. Dial in perfect condition just a few very light scratches to crystal should polish out easily

Enjoy it mate!