Hey all,
Thanks for the input. Bonnie and Rob, I'd say you've nailed it, especially the picture of the 1 Pint saucepan, Bonnie. The "diamond L" mark is almost identical to the marks on mine and the lettering is pretty close.
There's a difference in the details of the lettering on my two pans, with the lettering on the No. 3 having more detail. The "diamond" is larger then the one on the No. 5 and as Hilditch pointed out, it has a much heavier gate mark. The handles are both the same: a piece of steel or tin? rolled into a taper with the small end in the iron socket of the pan and the large end capped with a circular piece of metal. The gunk that poured out of these two handles when I stripped them!
I may have to locate some colleagues in the UK... At $ 15.00 for the pair, I'm pleased with this find.