Parker 51 Shell in Coco extender It is nickel plated with

It is nickel plated with a lot of brassing and one ding

You then have to use a bud burr and/or a pick to break-up the threaded part of the clip screw ("Jewel") that remains stuck in the clip bushing so you can screw a replacement clip screw into the bushing

Not as complex as our PTS7 double barreled pliers

VERY GOOD REPRODUCTIONS OF PARKER 51 JEWELS (REFERRED TO MORE PROPERLY AS "CLIP SCREWS" IN PARKER SERVICE MANUALS)

REMOVING PARKER JEWELS FROM THE TOP OF CAPS

Parker 51 Shell in Coco extender It is nickel plated withNew old stock. COCOA SHELLS HOODS FOR PARKER 51 Fountain Pens. Fine thread for standard size 51s. Won't fit the Demi. These are 48 threads per inch. These are available with and without cut outs for O Rings **Note: These will not fit Demi size 51s. **Note that Parker's Coco comes in a variety of shades, so the color may not match your barrel perfectly.