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ID: 144863 Closed
Listing ID: #144863 has been added to your wishlist.
MBP #9 Six Key Mine by Robert Rose
MBP #9 Six Key Mine by Robert Rose

MBP #9 Six Key Mine by Robert Rose

rmoy8995 20
Item Location: United States

$640.00

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Minimum Bid: $650.00 32 bids
  • Bids
Bidder Amount Date
Gocrager 367 $640.00 15.03.2026 00:16:00
icing 10 $630.00 15.03.2026 00:16:00
Gocrager 367 $610.00 15.03.2026 00:12:21
icing 10 $600.00 15.03.2026 00:12:21
Gocrager 367 $560.00 14.03.2026 17:32:10
icing 10 $550.00 14.03.2026 17:32:10
icing 10 $535.00 14.03.2026 15:58:45
Gocrager 367 $525.00 14.03.2026 15:58:45
Gocrager 367 $510.00 14.03.2026 15:58:32
icing 10 $500.00 14.03.2026 15:58:32
Gocrager 367 $430.69 14.03.2026 15:55:38
icing 10 $420.69 14.03.2026 15:55:38
Gocrager 367 $410.00 13.03.2026 16:46:12
MJay 65 $400.00 13.03.2026 16:46:12
Gocrager 367 $380.00 13.03.2026 16:45:51
MJay 65 $370.00 13.03.2026 16:45:51
Gocrager 367 $360.00 13.03.2026 16:45:38
MJay 65 $350.00 13.03.2026 16:45:38
Gocrager 367 $330.00 13.03.2026 16:45:24
MJay 65 $320.00 13.03.2026 16:45:23
Gocrager 367 $310.00 13.03.2026 16:40:04
MJay 65 $300.00 12.03.2026 17:21:31
MJay 65 $250.00 12.03.2026 17:11:19
MJay 65 $220.00 12.03.2026 15:55:20
syko159 154 $200.00 11.03.2026 01:59:28
MJay 65 $185.00 10.03.2026 10:52:16
syko159 154 $175.00 09.03.2026 15:37:21
gemini 30 $165.00 08.03.2026 18:59:46
syko159 154 $155.00 08.03.2026 00:34:51
gemini 30 $145.00 07.03.2026 21:51:42
gemini 30 $135.00 07.03.2026 21:50:19
icing 10 $125.00 07.03.2026 18:53:54
Description

Six Key Mine is number 9 in Robert Rose's Mental Block Puzzles series. This specimen is an original Rose, exceptionally rare to find. One of the six keys is labelled "MBP 9 6 Key Mine". 

This Puzzle won 1st prize in the 2003 IPP Puzzle Design Competition.

It is one of the more unusual looking all-metal puzzles in the sense that it is neither squarish, rectangular, cylindrical nor just a sphere per se (like the Isis).  Rather the puzzle consists of a polished aluminium hollowed-out sphere or ball with six aluminium pegs inserted into its sides.

The puzzle is slightly less than 3 inches wide from peg to peg and feels hefty in the palm. The object of the puzzle is to place all 6 pegs into the 6 holes in the sphere. This is not easy as all the 6 pegs are not identical to each other, especially where the bottom half (where there is a flat protruding portion) is concerned. The whole purpose of making each peg different is so that if you inserted a peg into a hole which it does not belong, it would block another peg later from entering. To make things even harder, the holes themselves all have different orientations relative to the sphere.

Shipping will be calculated after the auction ends.

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Hoffmann's Barrel & Ball Puzzle
rmoy8995 20
Hoffmann's Barrel & Ball Puzzle
Hoffmann's Barrel & Ball PuzzleObject is to remove the ball which is inside the barrel. Measures 2-1/4" HMaterial - Aluminum & Plastic RodShipping will be calculated after the auction ends.PayPal Family & Friends accepted.
$125.00
0 bids
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MBP #3 Triple Dovetail Triangle by Robert Rose
rmoy8995 20
MBP #3 Triple Dovetail Triangle by Robert Rose
The Triple Dovetail Triangle is number 3 in Robert Rose's Mental Block Puzzles series. It is exceptionally sturdy and beautifully machined from aluminum.Shipping will be calculated after the auction ends.PayPal Family & Friends accepted.
$450.00
Buy Out: $450.00
Cutaway Dovetail Puzzle by Perry McDaniel
rmoy8995 20
Cutaway Dovetail Puzzle by Perry McDaniel
Designed by Robert Sandfield  and Crafted by Perry McDaniel At first glance, this one resembles a slightly enlarged Sandfield Joint, except that someone has taken a bandsaw to it and cut out one of the corners – leaving the inside edges significantly rougher than the rest of the puzzle. (Nice touch, that!) Interestingly on this puzzle, a casual shake of the puzzle reveals something rattling around inside… treasure perhaps, or just part of the locking mechanism – who knows, eh? ;-) The ...
$150.00
1 bid
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The Pharaoh's Secret by Perry McDaniel
rmoy8995 20
The Pharaoh's Secret by Perry McDaniel
Perry McDaniel, a favorite craftsman and fellow Texan, uses something a bit more modern to achieve his precision, but I suspect he could do it with shadows too. He designed (along with Norman Sandfield) and created the Pharaoh’s Secret, a miniature pyramid made from walnut, mahogany and padauk woods. Those familiar with the creations of the Sandfield brothers won’t be surprised to see that this pyramid is held together by perfect dovetails, impossibly positioned at opposing sides all around....
$295.00
7 bids
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