Perfect 160 year old paperweights are hard to come by

so I wouldn't worry about imperfections.
If you plan to sell it I would recommend against repolishing it, some collectors prefer pieces in their original
condition, and those who like perfection can have it repolished at their own expense and risk,
repolishing does take away a bit of glass and can reduce the appeal of the paperweight.
You loose a little bit of magnification with each repolish and you run the risk of cracks or even total catastrophe.
If you're planning to keep it then it's up to you, I think it looks great as is, but that's just me.
I am no expert on sizes tho so it could have been repolished once already.