The Universal Geneve Tri-Compax 881101/01 was produced from 1963 until 1967 (caveat: I believe…). Otherwise known as the “Eric Clapton”, as Slowhand regularly wore the watch during the 1960s, the 881101/01 is powered by the Calibre 281, features a white dial with black registers, and three complications (“Tri”): chronograph, moonphase and calendar (date, and apertures for day of the week and month). Depending on date of production, there are differences in hand colors and logo on the crown. I have added discussion of reference 222102/1 which has been seen once with reference, and appears identical to the early 881101/01, with the exception of the caseback etching style.
I will not be touching upon the 881101/02, which is known as the, yes, “Evil Clapton”, and features a black dial with white registers, among other differentiating features. Due to the sheer scarcity of information on either white or black 222102 references, I have included discussion of the 222102/2 with the 222102/1, which, as above, looks identical to the 881101/02.