It's fine and positively encouraged to ask for help.
However, rather than a simple "I'm looking for a 300 and have found these six examples, are they correct?", it's much better to do your research so your questions are more along the line of "I've seen this 300. From what I know x and y are correct but I'm unsure of a, as I expected to see b, what does everyone think?".
As above thee are a huge number of threads that discuss thevintage 3oo. There's a thread just on the bezels (link posted above), there's a huge thread on bracelets for 60's sport watches (below). If you're looking at this model you really need to go down the rabbit hole with it to arm yourself with knowledge so you can be happy with what you're buying.
https://omegaforums.net/threads/fro...ge-seamaster-and-speedmaster-bracelets.45883/Click to expand...