
The camouflage overalls in the "Birch" or "Leaf" colors were created in 1957 (the cuts of the suit could differ). This is not a prescribed uniform - it is a special suit that could be issued to any troops that needed camouflage (just like the winter white camouflage suit). This is how this color scheme first appeared.
Then there was a period when a new uniform for the armed forces was being developed. Each department conducted its own search for a cut, but on the basis of already centrally produced fabrics. Experimental batches of uniforms were produced and tested under real service conditions, based on the results of which changes were made and the next batch of uniforms was released. All these products continued to be used in the troops until they were completely used up.
Border guards most often used the "yellow birch" ("golden leaf") color scheme when sewing experimental samples of uniforms.

Experimental border guard uniform, 1976.

The officers are wearing a pea coat from the winter uniform of 1977. The color scheme is "silver leaf".

Camouflage beret from the 1981 uniform batch.

Camouflage beret with a visor from the 1982 batch of uniforms. This is what the border guards wear, giving it the shape of the "truck driver" cap in your photo. The border guards are proud of their caps, just like the Airborne Forces are proud of their berets.
Since 1987, the production of experimental batches of uniforms was discontinued. The uniform began to be made according to general army standards, but the “Birch” “golden leaf” camouflage was chosen as the fabric color for the border guards.
And all this variety could be worn in different border detachments at the same time, until the warehouse stocks of the previous uniform model were exhausted.