Badge "For Extended Service".

[EricFG]

I'm not quite sure of the title or translation.
One Russian books calls them: ЗА СВЕРХСРОЧНУЮ СЛУЖБУ which comes out as: For extra urgent service. I'm assuming these are for years voluntary service as opposed to conscripted service. Kind of a reward for career noncom? BTW, Igor calls it an "Extended Service" badge.

Anyway, here's the two I have; Red Army on top and Navy underneath.
The Army badge seems to be heavier and might be brass while the Navy one is aluminum or a similar metal.
Note the Army one has real enamel and the other paint. This leads me to believe one is of an earlier vintage than the other.
Also note the makers mark on the reverse of the lower badge.

Avers8 description: "Signs for extra urgent service.
The USSR #146 from August, 1st, 1957 have been founded by order МО signs for extra urgent for Aircraft and navy fleet Land forces. One sign for all time was thus provided, suspension brackets with a designation of years of extra urgent service were replaced only. Signs are produced from a brass, 38 х60 mm. Fastening on a pin."

Note the numbered pendants: The Army badge's reads 19 & 20 while the Navy's reads 10 & 25. This I attribute to the Navy's pendant really belonging to a Parachutist's jump badge.
Also note the pin mounting system on the reverse. While similar the Navy's is very standard and common while I've not seen the type on the Army badge before.