Yes it is, although this one is broken, so I just use it as a heavy pan when I don't need a full size jam pan. I have a working one, but I'm not usually allowed to use that for jam.
I made 70 jars in total, although I prefer to use smaller jars than is typical. Took me around 12 hours in total, from initial boiling of plums and damsons, to removing the stones, and then making it all one batch at a time. I still haven't touched the pears and there are lots of apples left. Most of the clearing up has been done too.
I told my wife that this is just batch 1 of the autumn, and she said it was the only batch if she could help it.