Having indulged in the purchase of the remains of a 1929 600cc Panther (yes, another project, but Knobby made me do it) I dug into the library to see what information there was to aid in the assembly of it, and hopefully help with details on what might be missing. The only notes that I could find were from the 14 weekly publications of Newnes Motorcycle Repair and Up Keep from 1931, with a section on maintaining Panthers from 1924 to 1931. The Panther section contributor was E.F. Chidley.
It has quite a comprehensive guide through the Panther engine including factory engine upgrades, oil pump details, carburettor jet sizes and servicing P&Ms own 4 speed gearbox. Better than a lot of other scant publications of the time.
To see the complete 14 page maintenance guidelines click on the front cover below.
It is a 4.5M PDF so you will need Adobe Acrobat Reader to view it.