Ciao Ed
here is my contribution to your thread.
I like to classify Italian WWII Bandoleirs in this way:
Bandoleirs for short arms:
model 1874/89 for the holster of the M.1889 Bodeo-Glisenti revolver (used until consumption). It has 3 pockets, each with 6 places for a cartridge.
model 36 for the holster of the Beretta M.34 (officially replaced the previous one in 1936). It has 3 pockets each for an ammunition package and a cut in the leather, near the ring, for the passage of the holster attachment.
Bandoleirs for long arms:
model 1991/97 for Carcano 1891 rifle, or carabine. It has 2 pockets, each with 2 places (there were 3 different colors for them: grey-green, brown and black)
model 1927 for Carcano 1891/38 carabine. It has 2 pockets, each with 2 places and a supplemental ammo pouch for further 2 Carcano magazines instead of the ring for the pistol holster.
here are some of my bandoleirs
at left the m36 then the m27, the colonial m91/97, the m91/97
here is the m91/97 for colonial troops
here we can see the differences between m36 m91/97 and m27
an holster for the M.1889 Bodeo-Glisenti revolver in webbing.
an image of gunner of a REI motorized division with a tropical uniform and an m36 bandoleir.
(he died in action for the RSI in aug 1944).