Welcome to the board !
A "Jubilee Pastel" does not show up in any of my sources - but there was one on ebay about 3 years ago, numbered D44387 - which goes nicely with your D34443, with D indicating 1986 as year of manufacture (whilst P would be 1996). Pastel was issued in several colourways - most in 1986 for the first time. 1986 was the 25th anniversary for Caithness (Glass - not Paperweights).
I would greatly appreciate a few high-resolution images of this weight, incl. the base with all markings. I'll send you a PN with my direct mail address for posting. If you still have problems to reduce your images to meet the requirements of the board, I could do that and post them for you.
Best regards - Wolf