Adjustment marks or PMD?

stealer

Not my coin: Heritage Trade Dollar

MacCrimmon

Those are roller marks (not adjustment marks) which were made by the U.S. Mint.

PerryHall

<< <i>Those are roller marks (not adjustment marks) which were made by the U.S. Mint. >>



Agree---the mint stopped adjusting the face of individual planchets after 1836 and started adjusting the edges which contiued until the 1880's.

Edited based on new information from RWB.

AUandAG

<< <i>

<< <i>Those are roller marks (not adjustment marks) which were made by the U.S. Mint. >>



Agree---the mint stopped adjusting individual planchets long before they started making trade dollars. >>



Really? I've seen the table the ladies in Carson City sat at to make adjustments to planchets. It's in the
coining room. I think that more than likely the striking pressure was higher in the 1870's than the earlier
years and thus effaces the adjustment marks.

Roller marks is a great explanation for this coin, however!

bob

PerryHall

I asked about adjustment marks on the NGC forum hoping that RWB (Roger Burdett) who is an coin author and researcher would give us some information on adjustment marks. He said silver planchets were adjusted into the 1880's by hand and then later the overweight or underweight planches were separated by machine and remelted. Up until 1836 when the mint installed steam power the adustment was made by filing accross the face of the planchet and after 1836 the adjustment was made by filing from the edge of the planchet.

lkeigwin

Definitely roller marks. Particularly obvious by the precise lines. I'm sure RWB is correct too.
Lance.