Jonstats has a Phillies cap on eBay listed as a 1977 Jim Morrison:

http://www.ebay.com/itm/201112489131

The cap has the 1988-1993 New Era company tag and sizing tag. Additionally, it doesn't have the sweat protection ring, which New Era used through 1988. I did message him, and he told me to go ahead and post here and look at his feedback. Then he blocked me from bidding on his items (his prerogative, entirely). It does suck, since I was interested in the Giants cap he has up, but what can you do.

Anyway, the Phillies cap is definitely misidentified, and at some point, the Diamond Collection flag was removed from the cap. You can see where the stitching was undone on the side opposite the sizing tag.