Moleskine

La Couronne du Comte

Online and brick-and-mortar shop, based in the Netherlands, which offers world-wide shipping.

Paper/Stationery Brands: 

Reid's

A very good store. The store has standard giftware and greeting cards in the front but the whole back third of the store is pens and paper.

Some of the many pen brands they stock are Aurora, Caran d'Ache, Graf Von Faber-Castell, Cross, Fisher, Lamy, Libelle, Mont Blanc, Montegrappa, Omas, Parker, Pelikan, Visconti, Waterford, and Waterman.

Mazzini47 - Comelity.com

Mazzini47 is a luxury store in Pordenone (North-east of Italy). They sell all kind of elegant and design gifts, from writing instruments, to business bags, to clocks, to leather items.

I really like this shop because of the kindness of its employees, the great quality of its products and the superb customer service.

Itoya

This is the main Itoya stationery store in Japan. The fountain pens are on the second floor right when you walk in.