C.H. Brigden Rare 18 Size Prototype With Constant Force Escapement, circa 1918
    Case: 57 mm, gilt metal, display case, 18 size
    Dial: enamel, Roman numerals, black minute track, subsidiary seconds, blued steel spade hands
    Movement: gilt, constant force escapement, full jeweled, plates adapted from an 18 size Elgin, bi-metallic compensated balance, main bridge signed C.H. Brigden 1918, stem winding and setting

    Note: Charles H. Brigden of Waltham Mass. applied for a patent filed in 1921 that states, in part - "This invention relates to clock escapements more particularly designed for timepieces in which extreme accuracy is desired. In such escapements it is desirable to eliminate all parts subject to friction, since friction is a factor subject to wide fluctuations from time to time due to varying lubrication and surface conditions of the contacting parts. This invention provides a construction wherein the usual crutch and pallet bearings are entirely eliminated so that friction is greatly reduced and in its preferred forms requires no lubrication between the pallet and escape teeth".

    Provenance: This lot was in the Time Museum as inventory No. 1062. It sold for $9000 in October 2004 at the "Masterpieces From The Time Museum" auction.

    Condition Report*:

    Type: C.H. Brigden Rare 18 Size Prototype With Constant Force Escapement
    Dial: enamel, Roman numerals
    Hands; spade hands
    Metal: gilt silverode
    Case Info: display case
    Case Width: 18 size, 57 mm
    Crystal: glass
    Watch Movement: gilt, constant force escapement, full jeweled, plates adapted from an 18 size Elgin
    Circa: 1918
    Condition: movement is good and running, case is good, dial with some hairlines

    *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".

    Fees, Shipping, and Handling Description: (view shipping information)

    Sales Tax information  |  Terms and Conditions

    Bidding Guidelines and Bid Increments

    Glossary of Terms

    Auction Info

    Bidding Begins Approx.
    25th Monday
    Auction Dates
    24th Tuesday
    Proxy Bidding Begins Approx.
    36 Days
    Bids + Registered Phone Bidders: N/A
    Lot Tracking Activity: N/A
    Page Views: 35
    Auction Type
    Signature®:  Heritage Live®:After Internet bidding closes, live bidding will take place through Your secret maximum bid placed prior to the live event will compete against the live bids. To maximize your chances of winning, enter realistic secret maximum bids on our site. Many of our proxy bidders are successful at winning lots in these auctions, and usually below their secret maximum. You can also place last minute bids directly with us by e-mailing or calling 1-866-835-3243. (Important note: Due to software and Internet latency, live bids may not register in time, so enter realistic proxy bids.)

    Signature® Floor Sessions
    Proxy bidding ends ten minutes prior to the session start time. Live Proxy bidding on Heritage Live starts 24 hours before the live session begins and continues through the session. During the live auction event, bidding in person is encouraged, and Heritage Live includes streaming audio and often video during the event.