A possibility is that the Vickers Mark X was one of the competitors in the 1902 evaluation trials for a British field gun to replace the BL 15 Pounder which was obsoleted by modern guns with recoil/recuperation. The final 18 Pounder gun was an amalgam of features of some of the competing guns since none of the competitor guns proved entirely satisfactory.
Hi PDA, I thought about the trials that Charlie mentions but was'nt able to find any info to back it up(like who supplied what), there a lot of reasons why the gun may have a passing resemblence to the 18pdr but be 75mm caliber instead, one could be that its intended as an export model where the gun may have obtained a totally different designation on delivery, Vickers MKX just being the prototype name.. one assumes there must have been nine otheres before it.. maybe asking the Archive will get a result?
Hi PDA found this Patent dated 1905 slightly different to the MKX photo but the carraige looks very close... I think in the photo the barrel of the gun is run back somewhat...
the small "mkx" in the patent description is my own addition and is not official
Hi PDA The date is 1905, US patents seem to be several years behind British Patents but not always, I think what it does prove though is the carraige is a Vickers design and is close to the 18pdr, I think theres too much of a coincidence for there not to be some connection.... still looking for the European patent to confirm date...
The Vickers gun looks a lot like the 15 Pounder Erhardt gun - probably reasonable since British manufacturers had no experience with the design of field pieces with recoil/recuperators (Naval systems weren't designed to absorb all the recoil - only to reduce recoil forces so the mounting wasn't damaged).
PDA's photo of the turreted Tank is highly interesting. Seems to be based on a Medium Mk C. I should very much like to know more about that, if such a thing is possible.
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@Ironsides. You are a regular Sherlock Holmes! Well done, mate, and thank you.
@Charlie. Nothing like a bit of reverse engineering when you can't think of anything original. It reminded me, also, of the 15pdr. I think because at first glance the end of the recuperator appears angled like that on the Ehrhardt.
@James. New thread started. The tank is called Vickers Tank No.1.