sought-after ! Sasaki Glass Pen Replacement Nibs, Pack of 6 [Sasaki Shoten]

Sasaki Shoten
Glass Pen Replacement Nibs
6 pieces per pack
(As shown in the second photo)

Nib Size: Total length approximately 22mm
Thickness (at the thickest point): Approximately 5mm
Threaded part diameter: Approximately 5.6mm
*Measured by an amateur with a ruler, so please use as a reference only*
The line width is likely equivalent to fine.

These are replacement nibs for the "Sasaki Glass Pen," the top brand of its time, boasting the highest level of technology and quality in glass pens, created by Sadajiro Sasaki, the wind chime craftsman who first conceived of the glass pen in Japan.
These nibs have an amber color and an antique feel.

They have been stored in a drawer for a long time.
They should be compatible with wooden-shafted pens where only the nib can be replaced, but since they are quite old and I couldn't find the shafts, I cannot answer questions about which shafts they fit.

shipment will be via Yu-Packet Post Mini.
The box is not included. Only the nibs will be shipped.

Thank you for your interest.