When Ace joined up with KISS he wasn't the Les Paul man he would later become but this was out of necessity rather than choice - he simply couldn't afford a Les Paul. In Ace's own words he "used to use an old Epiphone with an old humbucker in it" (GTRTW 1996). Although I think he was wrong about the humbucker, he got the guitar right. For KISS's first real club gig on January 30, 1973 Ace played an Epiphone Coronet.
The Epiphone Coronet, which was Gibson-made, was initially an alternative to the Gibson Les Paul Jr. It was a basic one-pickup solidbody guitar for a good price, no more and no less. The one that Ace played during the early part of 1973 was probably a 1960 or '61 model: it has the "second generation" body style with rounded edges ; the symmetrical "batwing" pickguard; and, although just barely visible under Ace's right hand, a P-90 pickup with a black plastic cover. In the March 10 pic
you can see a small patch of black above Ace's right hand that is the "dogear" of the P-90. A standard-sized humbucker wouldn't show up in that position.  The cherry finish shown was the only one available. The metal headstock logo plate, clearly visible in the January 30 pic, was replaced by a pearl logo in 1961 but the remaining stock of the metal logo plates were used on guitars produced in early 1961.
The pic from March 10 shows Ace beginning to develop his trademark makeup and a slight change to the Coronet. The logo plate has been removed and the tuners changed. The stock Coronet had 3-on-plate Kluson Deluxe tuners
with oval white tuning pegs (which can be seen in the January 30 pic if you strain your eyes a bit) but here we see metal tuning pegs of indeterminate style. The pics aren't exactly stellar in quality so it's hard to see whether or not Ace retained the original Gibson-style knobs or not.
Live or rehearsal pics between March 10 and July 13 are scarce, non-existant as far as I can tell, but some time in that period the Coronet is outed by the Ovation Breadwinner.