Over the winter, a fellow stumbled upon my Mechanical Pencil Museum online and sent me an email. He claimed to have, among other things, a Parker Writefine which, instead of an exposed eraser, had an eraser under a cap. The pictures he sent me weren't very clear, but we were finally able to agree on the price:
This example is identical to other ones I had in my collection, so the only reason I bought this one was for the different top treatment:
And under the cap:
However, when I got the pencil and looked at it closely, I became suspicious. The color and sheen on the cap were just a bit different from the barrel of the pencil, and while the cap fit perfectly, it just looked a little bit off -- that slight taper of the cap doesn't quite fit with the perfectly straight lines of the Writefine series. So I checked the rest of my collection to see if maybe the cap came from something else, and I found the culprit:
I switched caps, and yes, the Wearever cap fits perfectly on a Writefine. Lesson learned; chalk that one up to tuition.