Thank you, Mr Wingsofwrath, and herewith is my contribution.
No clue except to say it isn’t as it may seem.
If I say any more than that, too much is given away.
Any delays, sir, are fully understandable and accepted. 
Kind Regards, Uyraell.
I tried to look for hidden meanings in your picture, but to me it only says “Canadian made Ford MK.2 Universal Carrier” right off the bat. The serial begining with CT is also a dead giveaway.
And that is part of the point for that vehicle. It received another name entirely once it became configured as it is seen, because it became by extension part of another family of vehicles, many of whom were larger, and fiercer.
Hence my saying not all is as it appears.
The answer is available, though it will provoke thought to obtain.
Kind Regards Wingsofwrath, Uyraell.
Hm, I see…
Indeed, closer scrutiny convinced me that I was on the right track, but had missed the right answer by a few yards - the vehicle pictured is, of course, the Wasp Mk IIC, flamethrower version of the good old MkII*, as discernible by the special gun mantlet and tank of flammable liquid just visible behind the rear bulkhead.
Serves me right for not actually paying attention past the obvious…
Thank you for this thought provoking enigma Mr Uyraell, and I hope this will be the start of a fruitful collaboration on this thread!
You are, of course, correct, Mr Wingsofwrath. 
The next is yours sir, with my Thanks and congratulations to you.
I don’t quite have your superlative skills , but I am enjoying, and welcome this fruitful exchange and discussion.
Kind Regards, Mr Wingsofwrath, Uyraell.
Thank you, my dear Mr Uyraell, even though overlooking vital pieces of information in a picture is hardly an indication of skill…
In any case, let us proceed with this thread, by passing onto our next mystery machine:
Apologies my dear Mr. Wingsofwrath, but all I get is Error 404 on the attachment.
Kind Regards, Uyraell.
hmm that’s strange… I think some of the Imageshack servers suffered a crash or something, because some of my pictures have disappeared. Anyway, here it is again:
Many Thanks, dear Mr. Wingsofwrath.
I recognise our old friend mr. Tortoise.
Rolls Royce Meteor engine (derived from RR Merlin) of 600 HP; giving the vehicle a top speed of 12 mph.
Main armament was 32pdr gun, derived from the 3.7 inch anti-aircraft weapon.
Crew was 6 men.
Frontal armour was close enough to 8 inches thick.
Six vehicles were built, four of those finished post-war, and then used briefly in trials, approximately 1947.
Interestingly, at the time the Tortoise was designed, the British Army had no tank transporter vehicle capable of carrying the vehicle, so getting the beast to the front line would have been problematical to say the least.
In return, I herewith present a smaller curiosity, with some unusual features.
Kind Regards, Mr. Wingsofwrath, Uyraell.
P.S, my comment on your skills was in regard to your gift for finding unusual war materiel and knowledge thereof: a skill I admire and respect.
My kind Mr Uyraell, I thank you for offering me this nice example of an early T-18, the first ever tank built in the Soviet Union. As can be discerned from the photographs, it was largely influenced by the French Renalult Ft 17.
As a reply to your offer, please accept this rather curious beast:
Dear wingsofwrath!
I am new in this forum but let me dare to say: this vehicle above is an M5 3" self propelled gun (Cleveland Tractor Company (Cletrac))
Sincerely:
TGR
I am newbie here, or not, :rolleyes: let me ask: what is this?
(and why important?)
TGR
Ah, das waren noch Zeiten! Good Lord - the Burstyn Motorgeschütz from 1911, envisioned, but actually never realized combat vehicle for the Imperial Austro-Hungarian army, designed by an Austrian army officer, K.u.K Genie-Oberleutenant Günther Burstyn.
Thank you, my dear Sir, for this beautiful reminiscence! And here is a tiny token of appreciation for your splendid efforts:
http://www.youtube.com/watch?v=bQnbapvE1lY
Unter dem Doppeladler - Josef Franz Wagner
You know, even today I am somehow sentimental toward the good old supra-national Empire… 
I knew I’d seen the image somewhere before, but had lost the associated memory, Librarian.
Thank you for the answer Sir.
Kind Regards, Uyraell.
Congratulation!
You are right!
thanks for the marsch,
BUT…
You have to consider, that the official military leadership of our “famous” empire immediatelly refused the idea of such a vehicle as “Totally stupid idea!”
(anyways, this was the first “tank” idea with one central turret, one large caliber main gun, etc… YEARS before the monster english Mark family, the Whippet, french and german tanks…
…anyway:
It’s your turn!
regards:
TGR
Well, I know your feelings exactly - The god old k. und k was in many ways an interesting experiment that was ultimately failed by dissensions between its leaders rather than its various peoples (the whole debacle concerning the Austro-Hungarian Parliament during the year 1913 is at very best a hilarious example of accidental comedy) but looking down at the things built during that period that still endure in my country, I can see that being part of a great empire is always preferable to being part of a small nation…
Of course, when you think about it, that whole point might turn out to be moot after all, since we can always look at the EU as some sort of new empire in the making.
No doubt, we still quote that period in Hungary as “the last old peace-years”
Regadrs:
TGR
Oh, my dear Mr. Uyrael – I’m glad that you are still with us here, hence the pleasure is mine! 
And if we are so intrinsically inclined toward the Old Times, my dear gentlemen, then I have another armored representative of the Old Engineering School for you - a truly unique, dual-purpose military vehicle, actually produced in very limited numbers 3 years after our previously presented K.u.K. armored miracle, which remained in active service until late twenties:
Do you recognize this armored oddity, honorable ladies and gentlemen? 
Dear Mr. Librarian!
The photo is very unique!
This is the bad luck for the other nominates, that I interested the mexican war before.
And who can forget such a photo???
So this should be a mexican build armored car based on the 2-ton Mack chassis.
I do not remember rebel or govermenet forces used it???
Congratulations, this was a challange!
TGR
I concur with Tiger on this one. The truck pictured was built in 1917 by the Mexican Constitutionalist Forces, and, as can be seen in the photo, it could use either road or rail, due to its double purpose wheels.
Funny thing - I had the same photo in my files as a prospective enigma, and it’s a pity I suffered a blizzard induced power outage last night so that I missed it when it was first posted…