MN Spirotechnique..........

It is well known that the MN issued the Tudor Submariners as part of their kit. As a tool to work alongside the watches, the MN also issued Spirotechnique depth gauges. These gauges were worn on the wrist, often next to the watch to ensure you kept an eye on your remaining air and the depth at which you were working. Below are some pictures of one of the 'Spiros' that was issued to the Marine Nationale in the 1970s. They are a great accompaniment to a Tudorcollector's MN Sub!