Morgan Dollar Weight

I don't think I'd worry much about 0.06g. Although the Mint had pretty accurate weighing equipment during that era, their practice was to get the weight right on $1000 bags, combining "light" and "heavy" coins to reach that goal, rather than individual coins. Errors in weight which weren't egregious (and 4 tenths of one percent isn't an egregious error) were useful for evening out bag weights.

BH1964, why over 26.80? Actually it shows around 26.80. Thanks.

Yep, If you're right at 26.80g there are no worries unless the coin looks odd.

If you're over 26.80g, then I'd look for other problems. 1878 is a common date, there is a low chance you'll have a problem. Particularly if it's a sub-$50 coin.

1893S, given their (relatively) huge weight, the Mint's ability to weigh precisely and the commonality of counterfeited Morgans, weight becomes a useful tool for diagnosing fakes when one is aware of how the Mint did things.

The tolerance for individual Morgan planchets was +/- 1.5 grains on the "standard" weight of 412.5 grains. Or, roughly the "0.4%" I discussed earlier. Further, one would expect the Mint to hold a harder line on light planchets than heavy ones - light planchets being more likely to generate complaint than heavy ones - while still giving them the leeway to get the $1000 bag weight correct. The standard for such a bag was 853.75 Troy ounces with an allowable deviation of no more than 0.02oz, far stricter than the individual planchet tolerance.

With these numbers in mind, one can understand how very small weight irregularities can be a useful tool in Counterfeit Detection, at least for Mint State coins. I'd be very leery of one which was too light, and equally leery of a heavy one exceeding the standard we've discussed here.

And given the excellent quality of some counterfeits, there's no doubt that the majority of us who have gone through some significant quantity of Morgans in our time have inadvertently handled counterfeits good enough to deceive even a capable viewer. Weight is just another tool to minimize that possibility.

Store owners or dealers can think what they want about me, but I bring a very small digital scale and a loupe with me when I am buying certain Morgans. I am here to tell you that I swore up and down certain coin was legit and then it weighed out at 19g or close to it. Saved me from a several hundred dollar mistake.