Hi all,

I have come across this item/tool for which I'm at a loss as to it's use. I'm
making an assumption that because it has the word "Aft" it means toward the rear
of a boat - but assumptions are quite often wrong, especially mine.

Anyone seen one of these before? It's 9 cm high, and has lift-able flaps on all
four sides. Each flap covers 9 small holes that go all the way through the block
to the opposite side. It also has a removable block with a brass plate top which
also has 7 holes arranged in a daisy wheel formation.

https://s3.eu-
west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft01.jpg

https://s3.eu-
west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft02.jpg

https://s3.eu-
west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft03.jpg

https://s3.eu-
west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft04.jpg

https://s3.eu-
west-1.amazonaws.com/ric.rr.uploadarea/m4hQjur096dgRT5thaer/Unknown/aft05.jpg