Thank you, CC and Adrian, for your input. I, too, am flummoxed by the quite late usage of the block GR stamping! Is there any significance, though, to the fact that the early block letters found on blades were in-line to the hilt whereas these are perpendicular?
CC, That is an amazing and beautiful example of a Coastguard cutlass! You mentioned William stamps and I was wondering if you could have a look at the sheet metal cutlass I posted earlier(#6), which classically resembles a merchant type of the first quarter of the 19th, has a very weak crown stamp with either a WR or VR. I had assumed it was a later stamping, as it is weak and the style of sword from earlier. But with all of this new information on WR markings made into VR stamps and GR stamps still around in the mid-19th, the puzzle continues!
And do I dare say I've seen British 1845 cutlass marked simply with RN (Royal Navy? Yet, no crown or Victoria, or??? My head is about to explode!
)