Great history. You really know your stuff!I'm actually scared of what else you got
There are bits and pieces of info on them online and it took me a while to connect the dots but the deal is, in short, Lee Trevor was a French company that specialized in reviving classic US jacket designs, such as these truckers, CHP motorcycle jackets, cross zips, kaff racers, half belts, flight jackets, etc. but a take of their own. Kinda like Freewheelers. Only a handful of jackets was made in each style so they're very rare. It's possible that this trucker you got won't turn up again any time soon.
Anyway, what they did was they'd slap on a whole bunch of details and design features onto one jacket, stuff you'd usually find on several vtg styles. Some worked well, such as this one and others... Not so much. Like, they'd do both a half belt like on the Perfecto with belt loops in the back and on the sides, all on one jacket. They also extensively used these silly, made-up motorcycle parts brand patches on many of their moto jackets too. That was during the 80's or the early 90's I believe, not sure about that but despite some questionable design choices, I can tell you the quality of their jackets was second to none.
So were the prices. Supposedly, they were extremely pricey but... I don't know the specifics.
Another questionable thing was the fit of their jackets - They were typically over-sized, 90's style. Broad shoulders, baggy, short sleeves, etc. But it somehow worked well. Not the sausage casing styleforum crowd would go for but they did have this cool, rugged vibe to 'em. They were jackets.
They also went great lengths to get all the details right. Like, they had their own chain pulls and snaps and zippers and all that stuff. Ditto for the lining. I mean, the fact that your jacket is lined with a blanked is a huge deal. Anyone else'd just throw in whatever quilted nylon or cotton drill but they'd always try to make it right. You couldn't find a YKK on a Lee Trevor. No expenses spared.
So yea, pretty much exactly the same deal like Aero, GW, LW or anyone in Japan, just decades earlier. They used horsehide, goat, cow, etc. but never tagged their jackets accordingly. I suppose it didn't matter back then. But the hides were always, ALWAYS of the highest quality. Never printed, corrected, nothing. I mean, that much is clear from the photos you posted. Interesting thing is that back in the days when Aero used to sell vintage jackets from other makers, you'd occasionally stumble upon a Lee Trevor on their sale or eBay page and for a good reason. They're really good jackets. Better than most today. I'm still looking for one in my size.