The Venus caliber 75 is a vintage Swiss made mechanical hand-wound movement with 15 jewels. This movement was produced in the 1930s and 1940s.
This caliber was submitted with question as to whether it is a Venus 110 or 75. The two are very similar in jewel count and design, however, the sizes are different. One might assume that the higher caliber number would mean the larger movement, but that is not the case. The Venus 110 is 9.75”’ and the 75 is 10.5”’. Based on the size, the movement pictured is closer to the caliber 75.
The 75 was available with a variety of different bridge designs. Some later models were equipped with Incabloc anti-shock devices and others were not. If you have any input on this movement or the differences between the 75 and 110, please comment below. Also, we are in need of a picture of a 110, so please submit it here if you have a timepiece with that movement.