For my 1952 EA Boult I went with a Campagnolo Grant Sport. The very early ones with the drilled wheels are out of my budget. I have a period-correct Huret front derailleur operated by a Cyclo bar end shifter, also period-correct.
Front derailleurs were a mix in 1952
see photo and photo
It was a period of mix and match rather than groupsets. So you can choose components based on what was the best and the designs were quickly evolving.
The GB Hiduminium ("Standard") continued to be marketed well after the Superhoods were released. So still period-correct.