Lot 6580 - M-2 Three-Hole Pentacage

Designer/Maker: Stewart Coffin

Diameter: 17cm

Notes: Rare M-series objects are not so much puzzles, but more like geometric investigations. Made of 30 bars (pentagonal cross-section) and 30 pins; very light vax; one bar inscribed in pencil "M-2 STC 2017". Stewart's comments from the Compendium:

This model presents special problems because the ends of the bars interfere with insertion of the pins. In the model shown, this was taken care of by using short pins and shortening one end of five of the bars, thus turning it into somewhat of a puzzle and unfortunately introducing a slight dissymmetry. There are several solutions, depending on the location of those five shortened bars.

Lot 6581 - M-3 Five-Hole Pentacage

Designer/Maker: Stewart Coffin

Diameter: 18cm

Notes: Rare M-series objects are not so much puzzles, but more like geometric investigations. Made of 30 bars (pentagonal cross-section) and 30 pins; very light wax; one bar inscribed in pencil "M-3 STC 2017". Stewart's comments from the Compendium:

Given the illustration to go by, assembly is not difficult and could be a pleasant pastime. You start anywhere and just keep plugging in pins and adding bars as it gradually takes shape. And when completed, a further amusement is to try guessing or counting the axes of symmetry. There are actually 31.

Lot 6582 - M-4 Seven-Hole Pentacage

Designer/Maker: Stewart Coffin

Diameter: 22cm

Notes: Rare M-series objects are not so much puzzles, but more like geometric investigations. Made of 30 bars (pentagonal cross-section) and 30 pins; very light wax; one bar inscribed in pencil "M-4 STC 2015". Stewart's comments from the Compendium:

Seems to me we have seen this one before (see Thirty Pinned Pentagonal Sticks, #80). Same design and nearly the same size; just different woods.

Lot 6583 - Siamese Locked Nest (22-B)

Designer/Maker: Stewart Coffin

Size: 20x14x14cm

Notes: This design demonstrates that the Locked Nest (#22) pattern can be extended indefinitely. This has 18 bars and 18 pins; one bar inscribed in pencil "22-B, STC,2016". Unlike Locked Nest, where some bars and pins are joined, there is no evidence that any are joined here. Rather, the assembly is so tight, that nothing appears to disassemble; this should be considered a display piece rather than a puzzle.

Lot 6584 - Twelve Point (33)

Designer/Maker: Stewart Coffin

Diameter: 10cm

Notes: Six dissimilar pieces with unique assembly. Rough model with very light wax finish; slightly irregular fit and some surface irregularities. One piece inscribed "33,STC,2018".

Lot 6585 - A-B-C (111-C)

Designer/Maker: Stewart Coffin

Diameter: 9cm

Notes: Three pairs of identical pieces finished in very light wax, and form the third stellation of the RDD. Two mating halves each assemble with dfferent coordinate motion. The pieces are labeled A,B,C in pencil; but this (and the title) is done to deceive, as this is not how the halves are assembled. Some small gaps, but overall very good fit. One (exterior) piece inscribed "111-C,STC,2017".

Lot 6586 - Chicago (191)

Designer/Maker: Stewart Coffin

Diameter: 8cm

Notes: Six piece assemble with very tricky coordinate motion (see Expanded photo). Made of six fancy woods; fit is slightly loose when assembled, but movement becomes tight when expanded; light wear. One piece inscribed "191-A,STC,2003".

Lot 6587 - Diamonds (269)

Designer/Maker: Stewart Coffin

Diameter: 9cm

Notes: Twelve piece assemble sequentially, similar to Meteor or Twelve-Piece Separation. Fit is good with a few minor gaps; pieces with light wax; key piece inscribed "269,STC,2016".

Lot 6588 - Truncated Tetrahedron (275)

Designer/Maker: Stewart Coffin

Size: 8x7x7cm

Notes: Four pieces assemble serially to form a symmetric shape. The stand is removable. Pieces with light wax finish, with pencil marks indicating the assembly. One piece and base are both inscribed "275,STC,2013".

Lot 6589 - Design X-11

Designer/Maker: Stewart Coffin

Diameter: 11cm

Notes: Two-layer design (Garnet bits inside of Egyptian), with six pieces separate into two halves (axis indicated by pencil marks). Light wax finish; one piece inscribed "X-11, STC, 2016".

Lot 6590 - Split Star, Improved (X-15)

Designer/Maker: Stewart Coffin

Size: 10x10x10cm

Notes: Variation of Split Star (#75). Six pieces assemble in two halves with some slight gaps; light wax finish; one piece inscribed "X-15,STC,2016".