Any Game-Used Cap Collectors/Experts Out There?

[hiramman]

Just wondering if anyone has any photos and/or descriptions for year by year manufacturers and labeling for Major League game-used caps. I have several aquired directly from teams, but often see many for sale on ebay and by auction houses. Looking for any guidelines to help weed out the obvious problem caps versus good caps.

Anyone have any ideas or info?

[LWMM]

Does anyone know when players started using new era caps, at least?

[jwasserman]

I posted a similar question not too long ago. The answer I got was that during the 80s and earlier there was a mix of cap suppliers, with New Era being the dominant supplier in the 90's.