Any idea who made this engine and it's vintage?
Thanks,
Dave

Found out yesterday frim the guys at SmokStak that its an International.
Closer looking revealed a couple of IHC logos in some castings.

Any idea what it was used in?

The only thing on it that resembles IHC to me are the priming cups and what I assume is the oil filler cap. Is that a K&W mag? I would GUESS it was built in the teens or early 20's. If it is IH it sure seems primitive. I've read what was on Smokestak and agree that it must be out of a vehicle. The only tractor I am aware of that they built with a radiator in the back was an 8-16. But that engine used a Madisson oiler. Regardless of what it is, it's a nice find!

They say it is a truck engine, about 1917. The mag is an early bosch with  patent dates of Oct 17, 05, Oct 24,05 and Oct 6,08.

It is now unstuck and soaking with Kroil. Good project for this fall when haying season is completed.