Headset and bottom bracket time.
They are both Chater Lea, and a larger size than normal so the BBs take 5/16” balls instead of 1/4”. Meanwhile the upper race of the headset is 3/16” and the lower race 7/32”. There are a couple of cracks in the headclip, so I’m concerned about using it as the sole way of securing the stem, and may try to find a stem with an expander bolt - I do also have a spare headclip with even more cracks so I’m going to see if this can be welded up.
I spent quite a while getting rid of all the treacle-like grease in the BBs, and discovered this natty little sleeve insert for the rear shell which the grease nipple goes into. I assume that “FHGCLS” stands for “FH Grubb Chater Lea System” perhaps..?
The races are all in good nick but the spindles have some pitting. Incredibly rare in this size though so I doubt I’ll be able to replace, and I’m sure they’ll function fine enough.