City of Boston, USA.

This is the latest jigsaw and it is impossible to fit into the blip space. We bought it several years ago when we visited Boston, and it is quite a challenge as the pieces are very irregular shapes.
Another strange piece of information about this jigsaw as there was one extra piece - and I have placed it in the space between the box and the jigsaw on the table. I wondered if this is an American custom? It is the only jigsaw we have ever bought in the USA.