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Set registry question, what is “weight”?
baseballjeff
Posts: 1,085 ✭✭✭
Hello,
Long time Mercury Dime collector here. Could someone explain to me how and what this “weight” system is in the set registry. I mean, how does a 1919 D Mercury Dime have a weight of 10.0 while a more expensive Merc like a 26-S only have a weight of 7.0?
I know I should know this. Thank you in advance!
Jeff
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The weights on the first 6 coins are identical in the FB and regular sets.
The 1919-D is more expensive in FB than the 26-S.
So my guess is that the weights were constructed for the FB set, and then copied over to the regular set.
I agree that weight should be an increasing function of price,
to reflect the "difficulty" of obtaining the higher weight coins.
Weights for the varieties are all types of nutty. It's totally random and doesn't seem to have anything to do with rarity, demand or price if top pop examples were to be at auction.
In regards to the 19-D / 26-S question, the 1926-S is the KEY to the series in Mint State and Mint State Full Band but the demand does not push the price high enough, hence the messed up weight. The 26-S should have a higher weight than the 16-D in MS/MSFB....or if they are just doing broad weight ranges then they should be the same.
Not really looking for much these days but if I were, it might be a toner.
FWIW, the 'Registry Rules' say:
"After each set is registered, its "Grade Points" are determined. In unweighted sets, the grade points are the average grade of the coins in the set, plus or minus bonuses or deductions (see below).
For weighted sets, the rarest coin in the set may have a weight of "10" and the most common coin will have a weight of "1." The grades are multiplied by the weights. That total is divided by the total number of coin weights. That gives the "Weighted Grade Point Average." The "Set Rating" is achieved by dividing the weighted grade sum by the total sum of the weights in the entire set. All sets are listed in order of their Set Rating.
PCGS may release certain promotions, giveaways, contests or other events in which special labels, pedigrees or designations are attributed to coins authenticated and graded in conjunction with the events. At the discretion of PCGS, the weights for coins associated with these events may be awarded bonus points outside of the guidelines outlined below."
Source: Link, in the section titled "Grade Points, Set Ratings and Weighting"
There is also a section at the link titled "Points for Bonuses or Deductions". It includes information about Mercury Dimes.