João V gold 12800 Reis (Dobra) 1729-B AU58 NGC, Bahia mint, KM141 (Rare), LMB-100. Second shield. Original "diagonal...
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Description
A Key from the Bahia Mint
João V gold 12800 Reis (Dobra) 1729-B AU58 NGC, Bahia mint,
KM141 (Rare), LMB-100. Second shield. Original "diagonal edge". An
absolutely spectacular piece: this Bahia Dobra impressive in
strike, grade and eye-appeal. Though struck with crude dies, it's
well-rendered on a lustrous and somewhat glossy flan. The scarcest
date of the type, this extremely elusive issue may be regarded as
one of the keys of the Bahia mint, being only the fourth example we
have located coming to auction in the last 20 years, the Petropolis
piece an XF (altered surface) and the AU Details RLM piece being
the sole other specimen graded. To top it all, it has the the
coveted diagonal edge, proving it escaped the 1732 Reform. One of
the most impressive Dobras this cataloger has had the pleasure of
handling, and one which will likely excite advanced collectors.Ex. Paulistana Collection
Since gold was scarce in the Bahia region of Brazil, most of the 12800 Reis were struck at the Minas Gerais mint, and to a lesser extent, the Rio mint; as a consequence, Bahia-minted Dobras are considered the rarest of this 12800 Reis type. Additionally, coins minted in Bahia were typically crude, both as a result of the preparation of the dies and the striking process itself, culminating in the immense difficult of acquiring a well-struck and/or problem-free example.
The law of November 29th, 1732 prescribed that the minting of milled edge issues should cease, establishing the new fleur-de-Lis edge. These measures came about not only as a result of the widespread circulation of clipped/tampered coins, but also due to the great number counterfeits then seen in exchange. The coins were to be re-melted (with larger denominations such as the Dobras getting the new edge applied over the old diagonal one), removing the milled edge issues from circulation and uniformizing the new fleur-de-Lis types around the colony. According to the the 1732 Law, whoever was found carrying these old-edge issues would be considered a counterfeiter, suffering the severe sanctions of 4 years of exile in Africa, as well a fine on top of having the unlawful coins confiscated. The very few that survived this period are likely pieces that found themselves away from circulation, perhaps hidden in hoards, taken out of Brazil or lost at sea.
Metal: Gold
AGW: 0.8455oz
Melt Value: $4,282.46
Gold Spot: $5,065/oz (03-06-2026 7:16AM CT)
More information about Brazilian Coins. See also: Brazil World Coin Nationality.
Auction Info
2026 April 29 - 30 CSNS World & Ancient Coins Platinum Session and Signature® Auction #3132 (go to Auction Home page)
Bidding Begins Approx.
March
31st
Tuesday
Auction Dates
April
29th-30th
Wednesday-Thursday
Proxy Bidding Begins Approx.
24 Days
Bids + Registered Phone Bidders: N/A
Lot Tracking Activity: N/A
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Signature® Floor Sessions
Proxy bidding ends ten minutes prior to the session start time. Live Proxy bidding on Heritage Live now starts within 2 hours of when the auction opens for proxy bidding and continues through the live session. During the live auction event, bidding in person is encouraged, and Heritage Live includes streaming audio and often video during the event.
Signature®: Heritage Live®:After Internet bidding closes, live bidding will take place through www.HA.com/Live. 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 Bid@HA.com 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 now starts within 2 hours of when the auction opens for proxy bidding and continues through the live session. During the live auction event, bidding in person is encouraged, and Heritage Live includes streaming audio and often video during the event.
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