There's so much happening on this dial! Find out how it works! How it works: 1º By rotating the first crown its possible to ajust the month day and by pulling it changes the week day. 2º By rotating a second crown its possible rotate two wrings at the same time, that work like one and that indicate the week name on top and the year on the bottom. This is to ajust a kind of a perpetual calendar where between 1980 and 2000 you can find out the day of the week by aligning the year with the month. It also displays the current week day and month day. On the dial it's a matrix with all the month days, and another one with the month names, and made in USSR, witch mean that it was made before 1991. Condition: Case: signs of wear, Glass: some light scratches, Movement: clean movement, working Basic Info | Listing number | 4VU4H9 | Movement | Manual winding | Condition | Fair (Obvious signs of wear or scratches) | Scope of delivery | No original box, no original papers | Gender | Men's watch/Unisex | Location | Portugal, Lisboa | Caliber | Movement | Manual winding | Case | Case diameter | 40 mm | |