These tiny steam-powered engines from the 1960's are all rather rare, but this tiniest version of their vertical engine has been an illusive one, until this recently showed up on Ebay. It is original in the box, NOS. At only two inches tall, it is a tiny, but powerful boat engine. Probably the rarest of these is a tiny V-twin, and there are also two twin horizontal models, of which I have the larger, but not the smaller, version. I only know of one of the V-twins, and unfortunately, it is not in my collection! But I was very happy to add this small vertical. Even though it was new in the box and unsteamed, I felt the need to steam it immediately.
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https://youtu.be/D5i4gMBEa6U
I knew you were going to end up with this one

Nicely bought Doug, it’s a beauty!!
Nice addition to the collection Doug.
These are nice and small.Never seen these before.How long have you been looking for these.
4 or 5 years. Ever since i acquired my first tmy horizontal.
Great catch, Doug...!!!
and it's a great addition to your TMY collection.
Gil
Its interesting that that have cooling fins.
A neat little engine Doug , I like the sound of it. They look well built
These are the Corvettes of model steam engines.
Awesome addition Doug.
Thanks for the video.
These are powerful little engines. I have a horizontal model with the boiler coupler and propeller. I just might have to buy a boat to put it in, and try it out in our pond!
crazydoug