I’ve just been doing some research into the 37mm cannon and ammunition offered by the American Armaments Corporation from 1934-194? Looking through their catalogue, I noticed an Automatic Naval Gun which looked kind of familiar… a check on my photo files showed that this looks like an exact copy of the pre-WW1 McClean cannon in 37 x 136R “Heavy One Pounder” calibre (no surprise, their small 37mm aircraft gun was a knock-off of a Puteaux design). AAC of course liked offering their guns with their own unique calibres, just to make sure that users of their guns would buy their ammo, so I suspect that their version of the McClean was offered in AAC’s 37 x 142R, which was just a slightly lengthened version of the 37 x 136R.
Any observations on this?
Also, is there any information, anywhere, on how many of which guns AAC sold to which countries? I know that several countries are supposed to have been its customers (most of South America, Dutch East Indies) but more detail would be welcome.
Thanks for any help.
I attach a photo of the McClean which I took about ten years ago in the Heugh Battery Museum in NE England. Those things crop up all over the place…