741 905 Pressure Bulb
Year: 1980s
Description
741905 rotring Pressure Bulb (Druckball)
For starting ink before drafting and for rinsing through during cleaning.
Nice, rare and useful item.
Koh-I-Noor has similar product 3068SYR - Pressure pen cleaner,
but it was blue and with metal ring instead of black. (photo 17.)
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