This Omega 2416 came in a batch of watches to look at. It didn’t run, it was dirty and the crystal was in a terrible shape.
The movement is an Omega 28SC. It has an indirect sweep second. The concept wasn’t that successful as it had a few problems. The second hand would often stutter as it’s not in the direct flow of power from the gear train. Also, it adds an extra layer to the movement, resulting in a thicker movement. This movement still lasted for 6 years, though. After the movement was relisted as the 370 they probably used it for another few years.
It’s possible to look up the serial number on the charts available on the internet. The charts tell you that this particular serial number is from 1943. However, several sources state that the 28SC is in production since 1944. It must be one of the very first ones then.
For more info, here is an article about how to date your watch and this is an article on how to authenticate an Omega.
