What model is this box?

[Snap-on Boy 92]

Hello there, just bought this off a tool group for buying and selling and I got it pretty cheap £60 roughly $100 which in the country for a roller cab with keys is cheap!
The top box has keys and a lock to, I got my dad to collect it for me as I'm away from home at the moment just wondering what model it might be. I have one similar but the bottom box lock isn't the same shape and the handle on the top box is different. Is it late 70s- early 80s ish? My dad says it's nicer than it looks in the photos but needs a good tcut.
It's now my 18th snapon tool box the collection is growing!