Spanners and sockets

[Rex]

The franking machines made by Pitney-Bowes were carried around in specially made boxes so that they didn't get damaged.  Any time the postage rate got altered in the budget, the franking machines would have to be altered accordingly.

That was the so-called "metered mail" where firms who posted out a lot of stuff could frank the mail themselves rather than go and buy a few thousand stamps a week. I was meaning this old bugger and it's derivatives as used in sorting offices of the past-
https://postalmuseum.si.edu/object/npm_1992.2002.43

[Lone Wolf]

That was the so-called "metered mail" where firms who posted out a lot of stuff could frank the mail themselves rather than go and buy a few thousand stamps a week. I was meaning this old bugger and it's derivatives as used in sorting offices of the past-
https://postalmuseum.si.edu/object/npm_1992.2002.43

Wotcha.

Dimensions  42 x 35 x 26 in

That would make for a bloody big top box.

[Rex]

Good solid high grade cast iron, too. Put that in your top box and you'd be pulling wheelies all day...