Afaik, the W did stand for 'Weitwinkel', or 'wide angle'. That too was a marketing driven addition, I believe.By the time Binocollector's multi-coated Jenoptem came along in the 1980s these binoculars were selling in western countries for peanuts (except in the US), I assume because the DDR was desperate for hard currency. I see the 7x50W Jenoptem listed for £59.95 including 15% VAT in a 1987 Vic Oddens ad.
I bought a 8x30 Deltrintem from them in 1987 for £43.43 without VAT and could have bought an 8x30 Jenoptem for ten pounds less.
BTW, what is that "W" after the 7x50 for? It wasn't a wide field binocular (128m @1000m.)