As I work on some community resources for RQ, I am trying to make my life a little easier by tying things to Pendragon and to the ancient world, at least for points of comparison.
Working model is that 1 Attic Talent is about 75 Pendragon Librum or about 6000 L
1 Lunar weighs 0.2 troy ounces or about 6 grams. That makes it about a little larger than the drachma (4 gram), which might be explained just by the idea that there is more silver in circulation. Or maybe I got the weight off slightly.
I always viewed the imperial Lunar as being slightly bigger than a drachma but worth about the same.