It is possible that a number of the braze-on fittings were made by Roy Mitchell as they look similar to the ones on my EA Boult of 1952.
David Orr has described this and the Pennine CO2 pump at
https://www.classiclightweights.co.u...may-june-2009/ and scroll halfway down.
Dave also wrote about his bike and the fittings in the thread I did when I became the custodian of his EA Boult.
https://www.bicycles.net.au/forums/v...rt=25#p1365638
As it was from the same period as your father's bike purchase, it might help you better appreciate that period.
and like your frame, the braze-on for the CO2 pump needed the Terry pump clip.
So I made some
https://www.bicycles.net.au/forums/v...rt=50#p1383821
Let me know if you want one posted.