While rewireable versions of the IEC 60320 cord-end sockets and plugs aren't particularly obscure, I do have one of what is probably a fairly rare variant thereof. What differentiates it from most of those available is that this one is designed specifically to fit to light-duty flex (type H03VV-F), and anything thicker won't fit through the PVC strain-relief sleeve. This item was pressed into service a while ago for an emergency repair to a rodent-chewed fridge power cord, after which I promised to show how it's assembled, but slacked off for over a year. Well, what more am I waiting for…
The logo, I believe, is for Belling Lee, and the part number appears to be 6006. The number in the triangular symbol (some approval mark?) is 4529. The exact age is unclear, but I'd bet that it's over 20 years old. Current is marked as 6A (as specified for 0.75mm² flexible cords under British regulations), but I have tested it to the full 10A without overheating (in the short term, anyway). (For that matter, I pushed even 12.5A through a 0.75mm² cord once before, without it getting uncomfortably warm to the touch; although connectors can ultimately be the weak link under heavy load, if they're not in tip-top condition.)
Remove the single slotted screw on the cover to get inside:
The pins are removable, so that you can terminate the wires more easily; this also enables interesting possibilities, including taking out the earth pin to make a type G (instead of E) plug. Simple set-screws are used, but a very thin (0.3mm) screwdriver blade is required to turn them. The terminal bores are large enough to take wires considerably thicker than 0.75mm² (up to 1.5mm²), even though a bigger cable is unlikely to fit into the plug.
The cord grip is a simple plastic bar secured with two screws. I have found it capable of gripping a 2-core flat sheathed flex (type H03VVH2-F2X0.75), at least to some extent. However, it can bend noticeably when tightened on round flex. Both the cover and grip screws go into threaded metal inserts (I'm guessing nickel-plated brass, from the lack of magnetic attraction; even though the screws are all steel).
If anyone else has this plug and wants stripping dimensions, I have a card in SVG format (created in Inkscape) that I could upload (inside a Zip or 7-Zip archive), featuring a colour illustration and dimensioned for an A7 page.
The quality of construction seems quite good, my only real complaint being noticeable leeway in the cover-to-base alignment. Overall, quite a neat "oddity", and definitely one I'll be keeping around for life (provided it isn't somehow ruined in the meantime)…