Several auction companies offer limited descriptions for their coins. The pictures are normally ok. A lot of these companies have low start prices and "good deals" can happen. Sometimes the pics can ID the coin, or in this case the scale weight. I am looking for uncommon Byzantine coin weights. I have some of the logical denominations (1, 2, 3, 4, 5, 6, 8...) and am looking for some less common denominations (7, 9, 11...). A recent auction has a weight that is 52.46 grams (vs an expected weight of 50.1 grams for an 11 sol wt). The inscription should be N II. It is hard to read the seller's picture. A good imagination could read an I at the top of the obverse. A couple of rotations shows the denomination. It is a 2 ounce Commercial Weight = Γ B. A 2 ounce weight should be 54.6 grams. This one is a bit low due to corrosion. The dotted design is similar to other weights I have seen. It is interesting that the only 11 N coin weight pictured in pondera (https://pondera.uclouvain.be/artifact/3267/) has similar questions about its inscription. 13 Nomismata/Solidi, 2 Uncias or 11 Nomismata/Solidi Bronze, discoid in form with plain profile but with raised edge; centring point only on the obverse; double concentring circles engraved along the edge; measuring 35 x 6 mm and weighing 49.69 g; engraved on the obverse with the denomination mark Γ Ι which seems probably that it was engraved later; originally not inlaid. The reverse is blank. Its mass corresponds to an eleven-nomismata (nomisma of 4.51 g) or two-uncia (uncia of 24.84 g) but the denominational mark (Ι Γ) denotes to thirteen-nomismata (nomisma of 3.82 g). So, its weight does not strictly correspond to its denominational mark. Alternatively, it is highly likely that it is not a Γ Ι but rather a Γ Β then it stands for two-uncia. In this case, the left bar of the B is engraved deeply, while the two semicircular part of it may be incised lightly and thus it is not visible. This practice was known when the B is inlaid. Note, the pondera weight is more under weight than the one for sale. It is possible that it was less honest than the other.
