DWLange

The doubling is extremely minor. There are many DDO and DDR varieties for the 1964 half dollars that are so slight and so similar to one another that NGC won't attribute them.

Sinking of the die from improper hardening left the coin poorly struck at Liberty's lower hair curls and the corresponding area on the reverse. Such pieces have to be net graded.

Things get trapped between the zinc base and brass plating, including gas. When these contaminants are compressed at the moment of striking some weird effects occur as raised metal on the coin's surface. It's too common on Zincolns to have any value.

The new number is used solely in house for tracking purposes when NGC-slabbed coins are resubmitted for variety or mint error attribution. It is not included in the census. The only time the tracking number becomes a new certification number is when the submission is for regrade or crossover.

NGC receives large numbers of such "wishful thinking" coins every day. I hit the "sorry" button until my fingers are blistered, but there seems to be no end in sight. Since I'm not privy to the submitters' identities, I have no way of knowing whether it's the same folks each time or a new crop of the benighted.

Panama did not have its own mint, so that coin was struck at the Philadelphia Mint. From 1874 until the 1980s the U. S. Mint took on many such contracts.

I believe it refers to a clock position; 7 o'clock would thus be at the lower left on a coin or medal. In the instance cited by the poster, K-7 refers to the pivot point from which the doubled image emanates, so this doubling would become more pronounced the further it is from that position. Years ago there was a device for measuring degrees of rotation between dies, or the Kolit Scale. Evidently, Kolit was the fellow who created this tool, and the K positions are still used by some. I'm not certain whether this use of "K" applies to the example cited.

I agree with Just Bob. This is especially common on Zincolns.

They were produced by Joe Lawonde in 1970 and sold through the RTCS. The boards sold out many years ago. I have a couple different varieties of the board in my own collection, and I've sold one duplicate that I had. These are seen only rarely, and they always bring a strong price.

NGC did not distinguish between the two reverse types until about 20 years ago, and your coin was certified prior to that time. You may submit it to NGC for VarietyPlus attribution of the reverse type for $15.

In case you decide to collect them by check numbers:

Your coin wasn't made that way. It suffered that damage after leaving the mint.

Blame it on mobile devices. I use them only when I can't get to my desktop computer.

It is very interesting. I just finished reading it today.

In the early 1970s Bowers & Ruddy Galleries was purchased by General Mills. That was the era of corporations buying companies about whose products and services they knew almost nothing. It was not a good match, and QDB later bought it back in partnership with former associate Ray Merena (they had worked together at the old Empire Coin Company in the early 1960s).

Here's the album in question. It's variety WBB1dA1 in my book, and that stands for Whitman Bookshelf British, 1 Penny, First Title, 1st Edition:

It looks like an ordinary currency strike, though the obverse is faintly PL. The San Francisco Assay Office (Mint) coined the 1965 SMS sets in 1966, and the dies no longer needed for that purpose were likely put to work striking regular coins until August 1, 1966, when the current year's coinage commenced.

I agree that the seller's photos are just poor renderings of the genuine coin. Here are NGC's images, cropped to remove the labels:

From its location that may also be just the result of die clashing. The point of Washington's bust is roughly opposite the hat.

I don't see any doubling, but there are nice die cracks on both sides.

Here is a way to find an authorized NGC submission center: https://www.ngccoin.com/services/dealer-listing.aspx

Yes, the die was abrasively polished to remove clash marks or erosion lines, thus extending the die's life. This typically diminishes any low-relief features.

I'm looking forward to it. I've finally finished reading the last of the books that were ahead of your most recent issue (the 3F book), and I'm going to start it in the next day or two.

It's a novelty replica not intended to deceive but to entertain and, perhaps, educate. It wasn't coined with a hammer, but rather was molded. You can see the seam where the two halves meet at the bottom of the second photo.

It was struck unintentionally on a planchet of the old composition which was discontinued the previous year. This consists of 95% copper and 5% zinc.