TT Scale. The Ideal Scale.

Fine!
Looks like MaK 800D, isn't it?
http://de.wikipedia.org/wiki/MaK_800_D

The chassis is looking like V60: http://de.wikipedia.org/wiki/DR-Baureihe_V_60
It is Eastern German locomotive, but looks similar...

From Canadian Railway Observations:

Steve Morris kindly submitted this rare an interesting photo of CP (Germany-built) locomotive #1000 in Montreal, QC in the 1950‟s. Built by Maschinenbau Kiel of Germany as diesel hydraulic MAK-1000 demonstrator unit. This unit had spoked wheels and connecting side rods and an 800 HP. 4-stroke MaK-MA-301A engine with a Voith Hydraulic transmission. It was painted in the CP Tuscan red and grey and numbered CP #1000, and tested on CP in 1956. The unit was returned to Germany and none were purchased.

Oooh. I wasn't aware that CP tested one of the MaKs - thanks for that! :)

Here's another oddball From WWW.CPRDIESELROSTER.COM = CP DEMONSTRATORS:

GMD 1001 GMDH-1
Built by GMD as demonstrator #1001 (12/1956). The unit was painted in GM colours and lettered GM Diesel Ltd. and numbered #1001. It tested on CP between May 30 to August 13, 1957. The unit performed unsatisfactory and was returned to GMD. It eventually ended up as a plant switcher at GMD, London ON.

Hydraulic Torque Converters are not popular in North America.

Wow the designer really thought he was working on a car :))))

more new additions to the fleet. and that loco does looklike it was designed by a car engineer!

what you might look at is some of the more esoteric prototypes. railways from countries that order from both european and american sources would look more plausible with american cars headed up by euro locos than any domestic american RR would.

uruguay for example used an odd mix of henschel german style 2-10-0s, alco export loco models and domestic sized RSC3s, 2nd hand DB four wheel railcars, a couple of streamlined american doodlebugs, some alsthom B-Bs very like the MAK pictured above, a bunch of US style boxcars and later, german and italian vans and cement hoppers.

B.

What Scaro said!

I've mentioned Cuba, he mentioned Uruguay... there are other possibilities too in South America, Africa and Asia.

Another option if you want to freelance? Pick a country that has no railways...

If we have more models, we can also mention Russia.
There were a lot of American stuff here - 2-10-0 steamer "Russian Decapod" as E locomotive, 2-8-0 S160 "military" steamer as Sha locomotive, RSD-1 diesel as Da, and also some wagons - in 1915-1917, and then in 1942-1945.
But there are no models of these prototypes in TT...