Dons

I agree.

No mark was put on Rigby when they refinished guns.

Same as Holland or Purdey don't mark a gun if it's refinished
and lots of English guns have been refinished by the makers and you wouldn't even know.

As to value, except for an absolute few die hards,
value isn't affected that much if at all and if anything,
maybe on extremely high end guns of which Rigby 275's
are generally not.