The web provides us with a considerable load of facts on Royal Navy weapons...I hesitate to use the term Cutlasses ...because that term never really caught on until very lately.
Anyway here is the website which I am pleased to see does mention The Cutlass... ...
https://en.wikipedia.org/wiki/Royal_Navy_cutlasses I was surprised to see that these weapons werent issued to Royal Marines who were issued with those incredibly long bayonets ...
I am by chance just refurbishing my Royal Marines artefacts and today I picked up a good Scabbard and sword knot...and I have located a Wilkinson Sword that will fit with the plan. Reading the exploits of Mad Jack Churchill I noted that not only did he use a longbow but during the Normandy landings was armed with a Royal Marines Officers Sword.
Peter Hudson.