COMMONLY USED GOLD WEIGHTS & MEASURES
WEIGHTS & MEASURES
1 PENNYWEIGHT - A pennyweight (dwt) is a unit of mass which is the same as 24 grains, 1/240th of a troy pound, 1/20th of a troy ounce, approximately 0.055 ounces or approximately 1.555 grams.                                                                                           
                                      Worth $40.00 prox. considering gold market values at $800.00 oz.
                                     A pennyweight (abbreviated dwt.) is equal to 1.5552 grams. 24 grains

Historically, a penny's weight was literally (as well as monetarily) 1/240th of a troy pound of sterling silver.  While "dwt" is the most common abbreviation for pennyweight (as "d" was the abbreviation for "penny" in the pre-decimalisation British system), some sources list "pwt" or "PW" as an alternative.
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