Shops of old really used to look like this (minus the Duracell!). In case you're wondering what the strange contraption is, it was used to send money overhead from one end of the shop to the other.
What a great find. I remember biscuit tins like this from when I was a child. We sold loose biscuits from tins like this in our shop and then if any were broken we sold bags of 'broken biscuits' at a reduced cost.