Can you identify this gun??

[Robert Dabkowski]

I don't dispute your points but would like to mention that at the time EVERY single operational BOFORS was needed for AA work in England's "Battle of Britain". Maybe the test boffins could only obtain 1 spare barrel/breach assembly and cobbled together a carriage ?? Just guessing of course and trying to come up with a possible explanation for the existance of "Frankenstein".

After all you don't need an elaborate mount to horizontaly fire AP rounds at armour plate targets. And single shot is all you need to test penetration ability. Multiple impacts would just make the test results harder to interpret.

I suspect that it was just a bunch of spare parts thrown together as a gate guard but the photos do show that some thought/skill went into it and as a rule the Cdn Forces don't park crap at their front gates.

Robert Dabkowski