This is my bike, new to me, a Raleigh Randonneur.
It has a threaded headset, I might use my roller bearing headset or get one with sealed bearings for ease and cleanliness.
Roller bearings help with speed slap and are less prone to brinelling like round ball bearings.
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72 Geoffery Butler, 72 Gugificatizion Witcomb, 72 Raleigh Gran Sport SS, 74 Raleigh GrandPrix dingle speed, 74 Raleigh international, 81 Centurion Pro-Tour, 85 Gazelle Primeur, 29rBMX, Surley Steamroller 650b