Octo Burr STC 110

This is a fascinating burr by legendary puzzle designer Stewart Coffin, numbered 110 in the designer’s catalogue. Unlike other 6-piece burr puzzles, the Octo-Burr appears to have 8 pieces of equal size and shape. Three pairs are fused together, so the final puzzle has 5 pieces. Made for an International Puzzle Party exchange.

One key piece is signed “110 STC 1997”.