[NigelP]

Thanks for the re-sizing hints. I did discover another resizer shortly after posting so I've uploaded the pics.

Have discovered that the "H I" is probably Tsar Nicolas 1st, where Nicolas seems to begin with H in Russian according to Wikipedia! Nicolas' reign runs from 1825-1855 and his Imperial Monogram looks remarkably similar to that of the sword even if not precisely the same.

Any further inputs would be welcome.