Lot #56: The US Army Air Force Type D-12 Direct Reading Aperiodic Compass
Sold for
$95.00
Time Remaining:
Closed (bidding was extended)
End time:
Tuesday, January 19, 2021 at 8:08:44 PM
The US Army Air Force Type D-12 Direct Reading Aperiodic Compass was used at the navigators station across many US WWII aircraft, including heavy bombers B-17, B-24, B-29, medium bombers B-25 and B-26, and transports C-46, C-47, and C-54. Made by Bendix, part number 1832-1-A, it has a serial number prefix of AF-43, indicative of a manufacturing year 1943. This compass is New Old Stock and is in its original box with matching serial numbers, a real find indeed.
The navigators' direct reading compass is known as an aperiodic (without a period) compass, since the needle returns to rest quickly and without appreciable overswing when deflected from its position. Radial arms or vanes attached to the card dampen the swing of the needle. This type of compass is mounted horizontally, and is read through a glass cover on the top. The compass consists primarily of a cylindrical metal bowl filled with compass fluid. In the center of the bowl is a semi-float type card to which are attached the magnetized needles and the radial arms. The card is marked with the four cardinal points, with an arrow indicating North. Inside the bowl, a fixed mark acts as the lubber's line. A graduated rotatable ring (verge), with two clamping screws, is fastened to the upper edge of the compass bowl. Across the inside of the ring are two horizontal, parallel white wires, spaced equally on either side of the N and S markings. In making readings, the ring is turned until the two white wires are parallel to the North-South lines on the card. The airplane heading is read as the marking on the ring which is directly above the lubber's line. A box containing magnets which may be turned to compensate for deviation is located on the bottom of the compass.
Measures ~7 inches diameter and ~4 inches in height.
This is in excellent working condition. As you can see from the pic with the iPhone, theres no problem finding true north!
Condition: Excellent Working Condition
Measurements: 7 diam x 4 h
no questions were asked
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Only Available Pickup Date/Time: Sat, January 23 2021 8am - 8pm
Pickup Location: Kondelin Road, Gloucester, MA, 019306 MAP
Please review below:
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You must book a pickup time within 24 hours of closing, or one will be assigned.
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Bidding Starts:
Wednesday, January 13, 2021 at 10:00:00 PM UTC
Bidding Ends:
Wednesday, January 20, 2021 between 1:00:00 AM and 1:49:00 AM UTC
See individual items for exact closing times.
Bid Date | Bid Amount |
|---|---|
Jan 20, 2021, 1:06:44 AM | $95.00 |
Jan 20, 2021, 1:06:44 AM | $90.00 |
Jan 20, 2021, 1:06:10 AM | $85.00 |
Jan 20, 2021, 1:06:10 AM | $80.00 |
Jan 20, 2021, 1:05:46 AM | $70.00 |
Jan 20, 2021, 1:05:46 AM | $65.00 |
Jan 20, 2021, 1:04:02 AM | $60.00 |
Jan 20, 2021, 12:34:13 AM | $55.00 |
Jan 20, 2021, 12:32:28 AM | $50.00 |
Jan 20, 2021, 12:32:29 AM | $50.00 |
Jan 20, 2021, 12:31:08 AM | $42.00 |
Jan 20, 2021, 12:31:08 AM | $37.00 |
Jan 19, 2021, 12:22:31 AM | $33.50 |
Jan 19, 2021, 12:22:31 AM | $32.50 |
Jan 19, 2021, 12:22:05 AM | $31.00 |
Jan 19, 2021, 12:22:05 AM | $30.00 |
Jan 19, 2021, 12:21:49 AM | $28.00 |
Jan 19, 2021, 12:21:49 AM | $27.00 |
Jan 17, 2021, 1:21:24 PM | $26.00 |
Jan 17, 2021, 1:21:24 PM | $25.00 |
Jan 17, 2021, 1:21:09 PM | $21.00 |
Jan 17, 2021, 1:21:09 PM | $20.00 |
Jan 16, 2021, 3:42:56 PM | $5.00 |
Jan 16, 2021, 3:42:56 PM | $4.00 |
Jan 14, 2021, 12:48:42 AM | $3.00 |
Jan 14, 2021, 12:48:42 AM | $2.00 |
Jan 13, 2021, 10:20:33 PM | $1.00 |
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