In late 1992, Paramount Design Group began working with Reynolds on a 753 OS tube set, but didn't start delivering Paramounts using 753 OS until the summer of 1993. After the bankruptcy, Waterford built Paramounts under contract to Schwinn under its new ownership, but in September of 1994 Schwinn decided to put the Paramount "to sleep". Basically, from the summer of 1993 until September, 1994, Paramounts with OS tubes were Reynolds 753 OS. In the late 1990s, Schwinn revived the Paramount and contracted the Reynolds 853 steel Paramount production to Match Cycles and titanium Paramount production to Serotta.
http://www.waterfordbikes.com/2005/d...ount/index.php Click on "---PDG-80's/90's" at the upper left of the page.
The late eighties non-OS Paramounts used SLX for smaller frames and a mix of SL and SP in the larger frames (over 57cm). Here's the sidebar from the '88 catalog with tubing specifications:
