145 75mm Mtn Gun - icon is too big gun for mountain vz.15 Skoda (used for 100-122mm howitzers) (top view:
https://forum.valka.cz/files/skoda-horske_delo_189.jpg)
Czech and Hungarian units use icon 2120
(BTW: Romanian unit 132 uses 2109 and should be unified as well).
146,359 75mm Field Gun - icon is a long-barrel gun, more adequate is 2111 or 2114.
BTW: according to Chamberlain's book, a mainstay of Bulgarian artillery was 75mm Schneider Mle.1905, with range only 8 km (198). It seems to be confirmed there
https://www.quartermastersection.com...ian/artillery/ (as M.1904) and on this page on WW1 Bulgarian artillery
https://www.bulgarianartillery.it/Bu...5mm%201904.htm (again as M1904). According to the later page
https://www.bulgarianartillery.it/Bu...01878-1915.htm and
https://www.bulgarianartillery.it/Bu...%20Germany.htm Krupp 75mm guns were captured on Turkey or delivered by the Germans during WW1, and had no better range. It would mean, that the gun is on-map, regarding 169 75mm Battery..