Sure I can. This is an so called exotic Tri-Compax from 1968-69 with the Ref. 81101/3
The exotic Tri-Compax models were introduced in 1968. There were two versions of the Exotic models as well: Exotic Slate with a blue-grey dial (this one), and “Exotic Teal” with a teal dial. The total production volume is estimated to have been around 250-300 pieces/dial. It is estimated that there are less than 25 Exotic Slate models left in the world, making this piece exceptionally rare. No guarantee on the numbers.
For this version there is a MK1 and a MK2 version, the difference being Tri-Compax printed above the 6 o'clock tot' or without, as seen on the version above.