"Let's make sure that history never forgets the name.. Enterprise."
The Enterprise C's crew wore Maroon Monster uniforms, with no turtleneck underneath, and no belt. They did however wear Movie-style Insignia pins, but they used them as Communicators (tap to talk). It was the hologram of Jack Crusher in the TNG episode "Family" who wore the Monster Maroon, again without a turtleneck or belt, with a TNG commbadge, suggesting that at some point following the era of the Enterprise C crew, the badges switched before the uniforms did. (this was however, a simple costuming mistake).
Late Maroon-Monster era uniform modifications as shown in TNG
Note the low collar, right breast flap, belt, and it has WoK piping on the back. (Sadly, the error here is that they used the Voyager combadge, which they wound up doing for more than one pre-Voyager character who showed up on Voyager.)
I note this because I bet even CBS would support that hybrid uniform being used retroactively for Jack Crusher or young Picard or folks from the lost era, since the only reason it didn't appear sooner was budgetary.
EDIT: Closed for necroing an old thread. Remember, if a thread has been inactive for 30 days, you should not post to it. Feel free to create a new thread on the subject if you would like to discuss further ~BranFlakes