A lovely vintage Japanese Eyedropper Fountain Pen likely handmade by Japanese lathe-master Eisuke Sakai under his brand Ban-Ei. This pen features an Ideal Warranted 14K Gold Fine nib made by the legendary Japanese nib master Ginjiro Kabutogi, and is stamped with "4-0" along with one of his JIS (Japanese Industrial Standard) registration numbers, 3233. Kabutogi is known as one of the greatest post war nib-masters and his nibs offer an amazingly unique writing experience. This Pen is in Good condition. 

This pen has had the worn out, original cork shutoff valve seal replaced with o-rings. Providing a great alternative to prevent leaks near the back of the pen. 90 day warranty on service work. 

- Manufacturer/Model: Ban-Ei (Eisuke Sakai) Eyedropper
- Year of Manufacture: December, 1954 (Inferred based on engravings on underside of the nib.)
- Color: Black
- Material: Ebonite (Hard Rubber), Urushi Lacquer
- Nib: 14K Gold Warranted Ideal 40 Fine Nib
- Filling System: Eyedropper w/ Shut-off Valve
- Condition Rank: C, Good. Moderate scratches and scuffs can be seen in the urushi finish as well as on the gold trim pieces. There is an engraving of Japanese characters on the barrel, a personalization done by the previous owner.
- Warranty: 90 days on service work
- Country of Manufacture: Japan

Condition Rank Guide:
-N: Item is in New Old Stock condition (NOS). Shows little to no signs of use apart from some minor handling wear.
-A: Item is in Excellent condition. Micro-scratches can be seen on the barrel, cap, and/or grip section. No noticeable scuffs, chips, or cracks.
-B: Item is in Very Good condition. Minor scratches and scuffs can be seen on the barrel, cap, and/or grip section. No chips or cracks.
-C: Item is in Good condition. Moderate scratches and scuffs can be seen on the barrel, cap, and/or grip section. No chips or cracks.
-D: Item is in Fair condition. Heavy scratches and scuffs can be seen on the barrel, cap, and/or grip section. May have small chips or cracks. See description.
-F: Item is in Poor condition. Item is not functional. For parts or repair only.