Question on Military Museum field guns, inconsistencies with the published book

[dragos]

In the courtyard of the Military Museum there are the following guns:

Skoda field howitzer 100 mm Model 1934 (weight 1600 kg, max range: 12000 m, shell weight 15 kg)

In the book "Armata Romana 1941-1945" there isn't any Skoda 100 mm M1934, the closest is M14/34 (Czech/Romanian) with the following characteristics: weight 1505 kg, max range 9970 m, shell weight 14 kg. What gives?

Bohler 105mm mountain gun Model 1940. I have found nowhere on the web a reference on this gun. Is it actually a mountain gun? The only German 105 mm mountain gun I know is the GebG 10,5 cm.

Skoda 76.5 mm Model 1925(?) max range 5000 m, weight 1300 kg.
In the book it is 76.5 mm Skoda Model 1928, max range 13100m weight 1816 kg. Which one is correct?

[PanzerKing]

Perhaps, they are from the same "family" of artillery pieces but different versions according to year?

Example: Skoda 1925 Artillery Piece, but upgraded model came out in 1928..so then the weight and characteristics might change a little bit.

Does that make sense to you? Just a guess anyway...