@the246guy:

Here is a snap of where the stain stands after my first attempt to get rid of it.

Do you guys see the dark patch next to the middle button in the attached image?

If the oil has not yet gummed / resinified, you may want to try out diatomaceous earth. I don't know how it is called where you are located - where I am I can buy it in the pharmacy. It works by absorbing the oil (or other liquids) because it is a powder composed of very small particles that create a huge surface area. This has strong absorbing properties and effectively sucks oil out of fabric. It was even possible once to clean a wood table stained with wax from a candle by using a flat iron to melt the wax first.

To remove an oil stain, I simply sprinkle some of the power over the stained area and let it rest over night, then shake it off and wash the piece. Btw. the ground breaking discovery of Alfred Nobel was to use this stuff as a stabilizer for creating dynamite, so its quite famous.

That's it, thank you!

Has this jacket ever been made in a different kind of cotton fabric (other than the oiled version)? Just asking out of curiosity because I got a M65 some years ago at a retailer and the fabric looks slightly different than the pictures, almost like a plain weave. I may be mistaken of course.

Much appreciated! Based on length, L should be the right choice.

It took me a moment to gather what you meant by T Rex arms, but that led me to an article that suggests that 120 years of research were needed to determine the purpose of T. rex's arms

https://www.bbc.com/future/article/20221025-why-did-t-rex-have-such-puny-arms

Thank you @Giles and @neph93, that is very helpful.

Thank you! For most shirts I am a size L, a few I have in XL. Being between sizes, I might end up getting two and sending one back. :-\

I am having a hard time deciding on size and am hoping for some helpful hints. I am usually the same size as Olly when looking for a snug fit, this is also true for the IHJ-75 which I own in a size M. That would point to an L here but based on the measurements, this one probably would work in size M as I am thinking to be using it for layering. What do you think?

Looks great. It seems hard to get the right impression of the color from the pictures. Almost looks like the blue might have a hint of purple or violet in it.

These are fantastic. Will size 34 be restocked as well? Would it be easy to add a copper snap to the other back pocket?

Looking at the video about shortening the belt I assume that there is a minimum to the length one can remove, i.e. at least the distance between the two chicago screw holes would need to be cut off to get a clean result without extra holes.
Is that correct and how much is that? Are the measurements (Base of Buckle Prong to 3rd (Middle) Hole) the same as for the IHB-07?