Italian guns to identify

[hibacusa]

Hello to all members. Recently, I was looking to a couple of photos of LUCE archive from the Greek island of Leros. Just for a short briefing, Leros was a quite big naval base during ww2. In every mountain there were batteries with a variety of guns, including naval - coast artillery (152/50 mm, 120/45 mm, 102/35 mm), anti torpedo batteries ( 102/35 mm, 76/50 mm, 16/40 mm) and anti aircraft batteries (102/35 mm, 90/53 mm, 76/40 mm).
In the numbered photos that follow, I have written on them my questions to you.
Any info or opinions about the type of the guns would be very helpful to my research.
Thank you in advance.
Best regards,
Nick

[kanister]

First: Navy's Breda;
Last: Scotti 20mm.

[hibacusa]

First: Navy's Breda;
Last: Scotti 20mm.

Thank you for the reply.
As for the rest?
In my opinion, photos 2, 2.1, 2.2 show a 102/35 gun.
Photos 3, 3.1 show a 152/40 gun
Photos 4, 4.1, 4.2, 4.3 show a 76\40 gun.
What to you think?

[kanister]

Sorry, but the others are too big for me.