On Aug 28, 3:24 am, "Rob H." wrote:
A new set has been posted:

http://puzzlephotos.blogspot.com/

Rob

1393 is a planometer. A mechanical devise for calculating area.
Actually identified some of these that a shop had on Portabello Road
in London. He had several but had no idea what they were. I used to
have one at work but someone ripped it off because it was so
outstandingly cool.