Engineer-Sapper Troops Qualification Badge.

[CtahhR]

Here are what I believe to be the entire Pontoon Unit of the Bulgarian Army of the late 1930's (less the higher officers).

The only dressed soldier seems to be wearing an example of the Badge.

There will be more on the pontoon unit of the Bulgarian Army with a Documented Order to the Commander of the unit, a Lieutenant Colonel, for exemplary service in 1941-2, including assisting the German crossing of the Danube in their push down through Bulgaria southward.