Thank you very much for your answer, Jarkko.Jarkko wrote
No such thing as 107 mm M1910-30 in Finnish use - this would original version of the gun from which the Soviets modified M1910-30 - referred by Finnish Army as 107 K/10.
The muzzle brake is something which I have not seen before with gun model - must have been an experimental thing, which was unsuccessful since it was not added to all heavy field guns of this type. During World War 2 Finnish Army tested this sort of "pepper-pot" in numerous desings - such as 76-mm F-34 tank gun of T-34 model 1941 Ps. 231-1 and added them in some artillery piece designs such as 114 H/18 (British Q.F. 4.5-inch howitzer Mk 2) and 122 H/09-30 & 122 H/09-40 howitzers or introduced them as part of the design as with Finnish 105 H/37 howitzers.
Can anyone identify these artillery pieces ??
26518: 105mm Mle 1913 ex-french gun or 107mm M1910 ex-Russian gun ??
35831: 122mm M1910 howitzer ??
Images from SA-Kuva archive (26518-35831)
Sturm78