I have a few US 90mm, 105G and 105H wooden crates, some from the 50's thru today.( thick Manila style rope handles the 50's thru the 60's on to black nylon rope handles). What they all have in common is the same metal hardware, it has gone unchanged. Your box appears to be US made, we did painted them but in a light tannish wood color when reused and relabeled, the only examples of those are 50-60's made. The earlier crates have ink stampings on the bottom exterior showing where made and specifications. I did not know other countries used the same US mil,spec crates. Interesting...I will add that old large caliber ammo crates in good shape are starting to bring unusually high prices, 50-70 bucks apiece. I buy all I can find in the 20-30 USD range...nice box. I just sold off a duplicate US 105mm M1, steel case, fiber container in crate to fund other purchases. The buyer said the crate and fiber container swayed him into buying it.