Skip to main content
Go to accessibility notice

    Description

    Hamilton Permanent Magnet Model 1 Mark 4, One Of Four Prototypes, René Rondeau Collection
    PM-1, Mark 4, one of four PM prototypes which would eventually evolve into the Hamilton 500. Movement only, incomplete, (as are all PM-1 prototypes - no gear train was used). With
    original patent from Hamilton archives, dated August 9, 1960 and issued to John Van Horn, Philip Biemiller, and James Reese. (PM-1, Mark 1 is in the Smithsonian.)

    The team of Van Horn, Reese and Biemiller began construction of a working model in July, 1952. In this watch, known as the "Model 1" of PM-1, the sides of the movement consisted of two curved magnets made of Alnico 5, a common and powerful magnetic alloy. The center of the movement was entirely taken up by a large balance wheel shaped like a figure-eight, wrapped tightly in fine copper wire to form the coil. The rare example presented here is featured in "The Watch of the Future" on page 33.


    Condition Report*: Type: Hamilton Permanent Magnet Model 1 Mark 4, One Of Four Prototypes, René Rondeau Collection
    *Heritage Auctions strongly encourages in-person inspection of items by the bidder. Statements by Heritage regarding the condition of objects are for guidance only and should not be relied upon as statements of fact, and do not constitute a representation, warranty, or assumption of liability by Heritage. All lots offered are sold "AS IS".

    Auction Info

    Auction Dates
    October, 2015
    29th Thursday
    Bids + Registered Phone Bidders: 3
    Lot Tracking Activity: N/A
    Page Views: 815

    Buyer's Premium per Lot:
    25% on the first $100,000 (minimum $14), plus 20% of any amount between $100,000 and $1,000,000, plus 12% of any amount over $1,000,000 per lot.

    Sold for: Sign-in or Join (free & quick)

    Heritage membership

    Join Now - It's Free

    VIEW BENEFITS
    1. Past Auction Values (prices, photos, full descriptions, etc.)
    2. Bid online
    3. Free Collector newsletter
    4. Want List with instant e-mail notifications
    5. Reduced auction commissions when you resell your
      winnings 
    Consign now
    • Cash Advances
    • More Bidders
    • Trusted Experts
    • Over 200,000 Satisfied Consignors Since 1976

    HA.com receives more traffic than any other auction house website. (Source: Similarweb.com)

    Video tutorial

    Getting the most out of search

    Recent auctions

    2014 September 23 Luxury Accessories Signature Auction
    2014 September 23 Luxury Accessories Signature Auction
    REALIZED $2,303,258
    2014 September 22 Fine Jewelry Signature Auction
    2014 September 22 Fine Jewelry Signature Auction
    REALIZED $1,970,300
    2019 September 23 Fall Fine Jewelry Signature Auction - Beverly Hills
    2019 September 23 Fall Fine Jewelry Signature Auction - Beverly Hills
    REALIZED $3,731,610