1955 Model 150D - C Spanner for exhaust ring to manifold

[Big Al]

I need a C Spanner to properly tighten the ring nut onto the manifold thread.
I have seen an adjustable one online at RS Pro that has max jaw of 51mm and min of 19mm.
Does anyone know if 51mm is going to be large enough to fit the ring nut on my 150D ?

[gerryjunior]

i use the c spanner for later series 1 / 2 /3 fork bearings , fits perfectly,

[Big Al]

Thanks Gerry.
I think I may have one of those somewhere.
Alan

[Jimmers]

Or a adjustable rear shock spanner fits good