i have a Standard snare with the half circle-triangle thingy for a badge. i know ludwig didnt get the whole "serial number" thing. but the number on the badge is 54672 and the sticker inside (which ironically is patterned after the "olive" badge) says 1021 for the model and 21720 for the date....it is a gun metal grey, metal shell....any help on actual age and additional info would be greatly appreciated...(yes its going on ebay!)

thanxabunch in advance j