Stunning models mate, especially given the scale. Much kudos to your dad for that.
My dad was into slightly bigger scale stuff ~ 3-inch gauge locos and, 1:32 scale (IIRC) steam lorry too. I think his crowning glory was his model of a Royal Scot class loco and tender called the Royal Engineer; a model he chose because of serving in the Royal Engineers for his National Service.
These photo's were taken in something of a hurry, so aren't very good at all, but you get the idea.
The photo's were because I had to sell them, so they're no longer in my possession. This one, though, is what my dad was working on before he died. It wouldn't take too much to finish I don't think, but I have little interest and absolutely NO skills to do so. This one's called the Firefly.
All of these locos either have, or can, run under steam. My mum has several pictures of my dad running the 'Engineer at a meeting of his Model Railway/Engineering club some years ago.
These pics kinda bring back how much I miss him.
Some people hear voices.. Some see invisible people.. Others have no imagination whatsoever.