Craig Gillingham

I missed this post, and I agree it looks to be something built by Clark.

I'm not an expert, however, looking online, at least some of them used a flat-head Chrysler. http://docthrock.com/clarktug.shtml

I think it's a vehicle built by Clark, sometimes called a Clarktor. There are a lot of similarities, and whether the rear section is original or not? I don't know. But, there are a lot of similarities; the engine, hubs steering column. https://military-vehicles-for-sale.com/wwii-clarktor-6-aircraft-tug/

The white car is an early 20's Buick.

I can help with a distributor cap. I'll send you a personal message.

It's very similar to a Dennis, but I think this one is a late 20's Leyland. They have those distinctive louvers along the upper edge of the bonnet/hood. Attached is a photo of a similar model.

There was the exact same type of V4 engine posted on prewarcar.com a few years ago. I don't know if it was identified or not. https://www.prewarcar.com/unknown-4-cyl-engine

I believe this is it; a 5 Ton General Vehicle Company truck from 1911.

Garford 6-50?

This looks like a Cole Aero 8.

There were three cars built by a UK company. It was covered in detail on prewarcar.com a couple of years ago. There are links to further articles, and to this brilliant video: https://www.prewarcar.com/a-sub-compact-cadillac-for-the-prince-of-siam https://www.youtube.com/watch?v=-rMgxEN3Kfg

Can you post me a link to something?

I think these would have been in Australia. I'm not familiar with the 1912 car, however I think the 1925 car is one of two that have been here since new.

This is the relevant page out of the 1909 Handbook of Automobiles. It only has brief specifications, and they weren't a cheap car.

AHa, sorry for the late reply. I don't know about their engine/design and I have been looking for period article I had that would answer your quetsions. I can tell it's a 6 cylinder, 6-60, as the 4 cylinders are distinctively shorter.