This must be the brightest pen I have ever seen, with the possible exception of the Chilton Clown. The barrel imprint tells me that it is a St Michael pen, made in England. Anything with a St Michael label was made for Marks & Spencer, a leading high street chain store. Marks & Spencer still sell pens today but no longer use the St Michael label. The current offering is a no-name pen which seems to be of moderate quality. I can’t tell with certainty when this pen was made or who made it. As to date, my best guess would be late 30s. The maker could be any one of the major pen manufacturers, or any number of jobbers. It has a Mentmore look but that is probably a red herring.
It’s a pleasure to see such a cheerful pen, especially when you consider that black seems to have been the default choice among British pen buyers for several decades. It has a nice warranted 14 carat gold nib. The clip looks a bit weatherworn but I’m sure I can do something about that. There is a shallow incision running around the bottom of the cap which might imply that there was once a cap ring there. On the other hand, many pens were issued with that incision but no cap ring. Considering that the cap screws onto the barrel very well there seems to have been no shrinkage which would cause a cap ring to fall off. Given all of that, I think the pen is in the same condition now as when it was manufactured.
I think that we may be too serious, at times, about our fountain pens. We need more bright, cheerful, multicoloured pens like this!