Tom,
What an interesting find !
“Y” indicates Super Squirrel & Standard 596 cc models 74.6 x 68.25mm
The number 165 does not appear in an old listing which I have, so the bike may not be known to the SOC; John Underhill (SOC Machine Registrar) has the definitive listings. He is not on the internet, but I will phone him this weekend, on your behalf.
Numbers which are in my list are 160, 166 & 168 – they are all dated as 1927. The engine number was the main one in the Scott Works records, which still survive, being held at the Vintage Motorcycle Club headquarters at Burton on Trent.
Frame number should behind the headstock, above the oil tank & radiator.
The nearside radiator filler cap is unusual – often fitted to racing machines for pit stop refills.
Publish an offside view.
Must rush, or I will be late for work !
