Information on Esterbrook cartridges and refills here
9579: Esterbrook Relief 314: black chased hard rubber slip-cap eyedropper-filler, 13.6 cm long, fully Esterbrook-marked, but clearly manufactured by Wirt; 14K gold ventless Relief nib, characteristic bottom-vented Wirt feed. Flanged section is odd: does not fit the barrel perfectly, and is unlike usual Wirt eyedropper-filler sections, yet is of unusual form characteristic of other Wirt models. Wirt-made Esterbrooks are rare -- this is the first example we've had in over ten years.
8604: Esterbrook H: smaller "Dollar Pen", black lever-filler, 11.1 cm long, stainless steel trim; early #1550 nib unit with flat-bottomed feed, angled imprint, is usable but scratchy -- use a more recent, more common replacement nib if you want a user.
10390: Esterbrook B: full-size "Dollar Pen", copper pearl lever-filler, 12.2 cm long, stainless steel trim, old-style #1554 Gregg nib with flat-bottomed feed. A clean example, noting slight waviness to the clip at the topmost hole along with straightening marks, cap posts on barrel end slightly to one side.
9625: Esterbrook Safari set in box: grey cartridge-filler, chrome plated trim, with matching .9 mm injector pencil; pen has #1551 nib, comes with 4 cartridges, 2 of which have been used (and which can be refilled, using a syringe); box is excellent, with instruction sheet, condition of set is like new.
10235: Esterbrook ballpoint refills: new old stock in original packaging, not guaranteed to work, sold as display item only. Marked "REORDER NO. C-021".