Some notable features of this catalogue include:

• There are two versions of the BSA derailleur shown. The 1950 BSA 4-Star is on scan 2 and the 1949 version has sneaked into scan 11.
• BSA intend the 4-Star derailleur to be used with a four speed cassette hub with easily interchangeable splined sprockets (scan 2).
• Dig those groovy pencil point stays - sharp! (See the photo of the BSA 4-Star gear on scan 2).
• Derailleurs are not just for racing bikes. The Light Tourist (scan 12) is offered with a derailleur option.
• There are about 6 different saddlebags shown, some with cunning saddle hugging shapes.
• Smaller children are offered ‘Junior Parabikes’ (scan 15) with curved tubes mimicking the famous bikes that BSA made for paratroopers in World War II.
• Any component made from duralumin or other similar light alloy is excluded from the guarantee (see section 2.(5) on (scan 16).
• The shy, retiring, Sir Bernard Docker has to get a name check (scan 16).

• Publisher: BSA
• Country: UK
• Date: July 1950
• Derailleur brands: BSA
• Derailleurs: BSA 4-Star (1st style), BSA 4-Star (2nd style)