Need advice on tiger stripe pants

[Bruv]

I am being offered these pants and wondered if they are period or not. The pocket styles match up with original types from what I could find. The big reservation I have is the 4 button fly. I read that all original button fly were 5 button with the top being big and the other 4 being a bit smaller. Is that true or not? Anyway, I would appreciate your help in this pair. Thank you in advance.
Dave

[frank savage]

I think they're repro. The wartime ones don't have that kind of straps to tight the waist, typical of the OG 107s...

[Beau Brummel.]

Reproduction.

[Bruv]

Thank you for the replies. That helps a lot.
Dave

[Spikey]

Looks like Tiger Stripe Productions pants.