How to Fill a Fountain Pen: Part V (Vacuum Fillers)

In this latest installment from our series, "How to Fill a Fountain Pen," we look at Vacuum Fillers (not to be confused with vintage "Vacumatic" filling systems, which are a different animal entirely and deserve their own video).
The pens featured in this review are also sold in our shop, and can be found at the following links:
1. Nahvalur/Narwhal Original Plus Fountain Pen: www.gentlemanstationer.com/th...
2. TWSBI Vac 700R Fountain Pen: www.gentlemanstationer.com/th...
3. Pilot Custom 823 Fountain Pen: www.gentlemanstationer.com/th...
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