I'd say it's likely a medium nib, but again this is not marked on the pen so it's hard to say for sure. Generally good condition, some wear from age, see photos for full condition.
This item is in the category "Collectables\Pens & Writing Equipment\Pens\Fountain Pens\Montblanc". The seller is "scorpoll2012" and is located in this country: GB. This item can be shipped to United Kingdom.