[rsk289]

Just to note: The Whitworth 'set'* I have bought from Lee, the UK seller on ebay, is marked with 'BSF' sizes on the 'Elora No.100 Made in Germany' side, and 'BSW' sizes on the 'CHROM-VANADIUM' side. All these spanners are marked the same way, no spelling variations. 'Chrom' is clearly not a spelling mistake or tooling fault, it's German for 'Chrome'. I would guess that variations occurring in sets 50 years on are mostly down to items getting mixed and matched - most boxed sets when new would have had consistent markings, I'd think.

* who knows? Might be an original set (I don't mean for Cobra), more likely not - but at least they match