Friday, August 11, 2017

8/11/17 Report - More on Metal Detecting Watches and All Metals Mode. Sedwick Treasure Auction. Numismatic and Shipwreck Salvage Presentations.

Written by the TreasureGuide for the exclusive use of

Two Areas of Weather That Might Affect the Treasure Coast

Yesterday I showed how one metal detector responds to watches.  I used the inexpensive Garrett Ace 250 for my demonstration.  I could have used a variety of other metal detectors and got very similar responses.  I might  actually do that some time.  Of course different detectors will respond somewhat differently, but the main point remains the same: how you use your detector will determine what you find or don't find.  As I am showing, it is easy to miss potentially valuable targets such as watches if you are not careful.  I've often warned of the risks involved with various forms of discrimination and too much reliance on target ID as well as other detector settings such as search modes that might seem convenient.  You can miss very good targets and never be aware of it.

Yesterday for my demonstration I used the Ace 150 in Coin Mode.  As you saw, there were times when the detector completely missed or responded minimally to large men's watches.  But what if you were not using such a selective mode?  I'll show you what happened when I switched to All Metals mode.

I used the same watches placed in very similar positions.  Also the same detector.  The only difference is that I switched to All Metals mode.

Here is the video link.

[ I corrected the following three or four paragraphs.  My original text was incorrect.  Sorry! ]

There are are basically two tones that you heard.  One is the Bell Tone that is used by the Ace to indicate a coin or similar good target.  The other tone is lower.

The signal produced by the various watches varied depending upon the direction the coil was moved.  That happens with a lot of targets, especially those that are elongated like nails or spikes.

The signal produced by the last watch ( the heavy high-end Seiko ) was the most consistent.  It produced a definite signal almost all the time, no matter if the coil was moved parallel or perpendicular to the face of the watch.  In one direction, though, the signal was a Bell Tone, and in the other direction is was the lower tone.

The first two watches often produced no signal, which you might find very surprising, especially since it was made using All Metals mode.

The main point is that with complex targets such as watches, the signal will vary depending upon a variety of factors, including how the coil goes over it.  Changing the direction pf the sweep or position of the coil by a few inches one way or another, often resulted in a very different response. That makes target ID for such targets very tricky.


Below is a notice I received from the Sedwick's concerning the upcoming treasure auction.  Even if you aren't participating in the auction, you might want to catch the guest speakers, which are listed at the bottom of this notice.

Sedwick's Treasure, World, U.S. Coin & Paper Money Auction #22

Now is the last chance to consign to our Treasure, World and U.S. Coin & Paper Money Auction #22, which will be our Fifth LIVE PUBLIC FLOOR sale. As usual this event will take place at the DoubleTree by Hilton at Lake Buena Vista in Orlando, FL, with live floor auction on Thursday-Friday, November 2-3, 2017 and lot viewing and guest speakers the day before (Wednesday, November 1).

The final deadline for consignment to our upcoming auction is almost here: August 17. We have secured a vast amount of great pieces but there is always a spot for interesting consignments and trophy coins. Many international guests will be coming from Latin America and Europe, so take advantage of our great LIVE FLOOR event and get top exposure for your pieces.

This auction will feature Part II of The Richard Stuart Collection Selections, which includes the largest group of Panama cobs ever offered in one sale with 10 unique pieces; an impressive assortment of unique and finest pieces from Central America, including Costa Rica, El Salvador, Guatemala, Honduras, Nicaragua (including the largest offering of provisional coinage ever presented in a single auction) and Panama; plus the largest single-sale offering of British "Admiral Vernon" medals from the same pedigree.

Other features in this auction include a selection of Lima gold cobs from the 1715 Fleet (many unique dates and finest known pieces) in addition to many other Fleet treasures like gold chains, ingots and other artifacts. Finally we have hundreds of cobs, particularly Lima and Potosi, and an exquisite collection of Mexican pillar dollars.

Guest Speakers Include:

1) Jorge Proctor, Numismatist and Researcher: "The Forgotten Mine of Colonial Panama"
2) Manuel Chac√≥n, Numismatic Curator: The Central Bank of Costa Rica "Costa Rica Numismatics"
3) Carlos Jara, Numismatist and Researcher: "Central American Provisional And Provincial Mints"
4) Capt. John Brandon, Historical Shipwreck Salvor: “An Overview of the Exploration For and Recovery Of Historical Shipwrecks: 1715 Fleet, Atocha and Lucayan Beach Wrecks”

We look forward to hearing from you, with thanks in advance.

Daniel Frank Sedwick, LLC


There are now two areas of weather pinpointed on the National Hurricane Center map for our area.  The first will just produce rain.  The other one has been out there for a while and might develop this weekend.  At this time it is expected to stay east of us and possibly make landfall in the Carolinas.  It is too early to say much about how that one might affect us.

On the Treasure Coast we'll be having something like a two foot surf again.

Happy hunting,