Special Round Puzzle

This is a 900-pc round puzzle, which I have completed over a few days (1-2 hrs per day). My mother said she fixed this puzzle with her two younger sisters when they were teenagers, like 30 years ago! Recently, she got it from my 7th aunt.

I think it is harder than the normal rectangular shape puzzle as it is difficult to look for the edge pieces (some inside pieces also have similar almost-straight edges), and there are no corner pieces.

I will be going for the SIMO camp, from 5 - 10 June, and will not be updating my blog till I come back from the camp.