At first Barry assumed it was two separate pieces screwed together, with a compartment inside. Not a bad assumption, but a wrong one.
Barry trying to unscrew the two halves.
https://www.youtube.com/watch?v=oSeX7G9-2rU
Next he decided to clean the paint off to get a better look at it.
https://www.youtube.com/watch?v=LvpdQTcBmvE
Then he put it in a vice and gave it some hefty donks with a hammer.
This revealed the seam as the weld was put into shear.
And a little shelf on the end.
Chisel time!
Bingo!
All done!