Electrick pioneer detonator 1940 identification

[Verikauha]

Doom of bridges and railways, of unknown origin.
Only electrick info is marked and graciously, a year.
Text follows:
1940
V.120__A1.5
OM.80_K.25

[Verikauha]

I found out that other finnish person also had same detonator, but was made after war, late 40-ties.
Thus I will assume this is Finnish made, not sweden or german as I initially thought.

[CBH]

It's not a Model 26 or Model 37 (Glühzündapparat) as issued to German troops.

[Verikauha]

Necroposting my answer to my own question.

This is Soviet made detonator, pre-war based model.
In original configuration it should have brass plate with Russian text. But it has taken been off and Finns have re-written new technical numbers into it. Finnish war-loot.