-SG- Arne has sent us photos of the C spanner he has which is marked up 'Norton Rockerbox'. In addition it bears the trade mark we have discussed on the web site before. He suggests that it may be intended for use on the Moore CS1 cam boxes - which seems quite possible to me, although I no longer have one of them to do some checking. Any other suggestions will be welcome, of course.
Postscript: Juris writes from Latvia to confirm the spanner is indeed for the Moore CS1 engines (he has an example himself). He also has a Norton C spanner for tightening exhaust pipe nuts - a better method than a hammer and a brass drift! Photos provided of the relevant CS1 nuts - and the C spanner: thanks Juris!