tdziemia
After looking in Levinson, I can add these comments:
1. The weight is indeed low for the type. Levinson reports weights 2.5 - 2.6 grams for 1458-1463. For 1456 he reports 2.1 gr. and for 1465 he reports 2.1 - 2.5 gr. From another Frisian mint (Bolsward), he reports a weight of 1.7 gr. for the 1457 jager. So, the weight on your coin is low, but not impossible for the type.
2. Your coin is correct on the 3 stars / 1 clover reverse, which was used between 1458-1463 as best I can tell.
3. Your coin is correct on the star/annulet punctuation reverse. As guessed, the punctuation varied a lot. Levinson's 1458 photo shows two stacked crosses for punctuation, also seen here: https://www.acsearch.info/search.html?id=473671
The 1461 and 1462 have two stacked saltires for punctuation, and the 1465 has two stacked stars: https://www.ma-shops.com/henzen/item.php?id=64229
Based on the design details, it looks genuine to me, but should be confirmed by technique like XRF. We don't have a specific composition in the Numista listing, but in this era, Low Countries coins of these denominations were typically around 40-50% silver.
As you can see from the second link, it is a rare type, and even with the small hole, highly collectible.
Hi,
Asked at Munthandel G. Henzen website, and here's the answer:
"This is indeed a jager 1460 from Groningen.
It is published in van der Chijs (Plate X, 54),
Frey 100, Puister 1.254c, Stephanik 3459 and Levinson III, 31.
It is a very rare coin. A pity that it is holed.
The weight is indeed rather low. The usual weight is circa 2.50 / 2.60 gram.
Due to circulation, weight loss always occurs. Oxidation or mounting can also cause weight loss.
But over a 0.5 gram loose of weight is a big difference, so I also doubt whether the coin is authentic.
"
Júlio