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Early Crusade Honours give a Centurion a master-crafted power fist and bolt pistol.
Delegatus gives the Centurion one master-crafted weapon.

So if a centurion took both would they have a master-crafted bolt-pistol?

You can only apply one centurion upgrade. So it's either a delegatus or early crusade honours not both.

Yeah, the early crusade honours is from the web centurion model they released. you can find the relevant data sheet here:
https://www.forgeworld.co.uk/resources/fw_site/fw_pdfs/Horus_Heresy/WebExclusiveCenturion.pdf