A nice Parnis open heart (balance), 50Hrs power reserve and day calendar complication watch with a Seagull 2505 caliber. A Chinese watchmaker, a beater for a cheap price.
Automatic movement with double bridge, suitable for "open heart" applications (from the dial visible balance, in the style of Vacheron Constantin). 25 jewels, 21,600 vibrations, 48 ​​hours power reserve, ball-bearing rotor. In-house development by Tianjin Seagull from the year 2000.
If you want to read more about the recent history of Parnis; here.