X-ray vision - ink vue style French celluloid

A nice little pen that I acquired recently at a French car boot sale. I particularly like this 'x ray' celluloid, which seems to be very much a French thing - at least, I've never seen it on an English pen, and it doesn't seem to be common in Italian vintage either. This is particularly nice because the colour is a sort of orangey pink like rose hip syrup.

It's a Matcher pen - Matcher Colombes was a French manufacturer that's not terribly well known but seems to have turned out rather nice pens. Or put another way, I've managed to find five or six over the years and they've all been good quality.

Unfortunately I'm going to have my work cut out with this one. I'm pretty sure the clip is a replacement, and it doesn't fit all that well, and the cap rings are missing. But it's still a stunning bit of celluloid.