To describe Maria Theresia Taler variants, we follow the classification and numbering scheme introduced by Dr. Franz Leypold in his book Der Maria Theresia Taler 1780 .

Maria Theresia Talers have a number of distinct features which can be used to determine the mint and strike date of an individual specimen. The following table summarizes the major variants and approximate strike dates for Maria Theresia Talers struck with date 1780. Please click on the images and links within the table for more information.

Obverse type: brooche	Reverse type: center shield	Obverse Signature	Reverse Signature	Cross / Saltire	Additional details	Leypold	Hafner	Rarity	Mint	Strike date
I	A	S:F:	-	(a)		5	25, 26, 26.2	2.5	Guenzburg	1780-90
							30a, 30b		Guenzburg	1780-90
							29, 31		Guenzburg	1780-90
		S.F.				1	27a-b, 32b	2	Guenzburg	1783-95
							30c-d, 32d		Guenzburg	1783-95
							28a-c, 32a		Guenzburg	1783-95
		-	I.C.-F.A.	(b)		24	6	5	Vienna	1780
			EvS-I.K.			17	4	7	Prague	1780
	C	S.F.	-	(a), (b), (c)	AVST.DUX	21	33a, 33b	3	Guenzburg	1797-1802
				(a)	AUST.DUX	30	34c	6	Guenzburg	1787
		S:F:			AVST.DUX	25	34a	3	Guenzburg	1797
					AUST.DUX	30	34b	7	Guenzburg	1787
		-	T.S.-I.F.	(b)		14	82, 83, 84, 85	3	Guenzburg	1795-97
			A.H.-G.S.			12	1a, 1b	2.5	Karlsburg	1788-90
				(e)		13	2a, 2b, 2c	2	Karlsburg	1797-1803
II	B	S.F.	-	(c)		2	36a,b, 37a-b, 38	1	Italy	1815-30
				(d)		3	39a,b, 40	1	Italy	1830-40
		F.S.		(c)		16	5	6	Venice	1815
		ST-S.F.		(d)		6	35	3	Milan	1790-1802
III	C	-	I.C.-F.A.	(b)	5 pearls in brooche; AUST.DUX	28	7a	6	Vienna	1780
					6 pearls in brooche; AUST.DUX	27	8	6	Vienna	1782/83
					4-7 pearls in brooche; AVST.DUX	10	9, 10a-d, 11, 12a-b, 13a-d, 14a,b	3	Vienna	1780-90
					8 pearls in brooche; AVST.DUX	23	15a,b, 16a,b	2	Vienna	1790-1805
				(e)		11	17, 18, 19a-d, 20	2	Vienna	1795-1853
			A.H.-B.S., A.H.-G.S.	(b)		29	00, 00a	7	Karlsburg	1786
			A.H.-G.S.	(e)		22	3a, 3b	2	Karlsburg	1812-1820
			T.S.-I.F.	(b)		15	86	4	Guenzburg	1798
			P.S.-I.K.			18	24	2	Prague	1812-1820
		S.F.	-	(e)	1-3-1 tail feathers	4	49a-c, 50a-b, 51, 52, 53a, 54, 55, 57, 58, 60, 61a-b, 62, 67a-b, 69, 70	C	mostly Vienna; few in Birmingham, Brussels, Paris, Rome	1853-today
					1-2-1 tail feathers	4	63, 64, 65, 66	1	London, Bombay, Calkutta, Birmingham	1936-61
				(g)		7	41a-c	1.5	Venice	1840-66
				(f)		8	46	2	Prague or Venice	1836-42
		.S.F.		(g)		20	43	2	Italy	1840-59
		S:F.		(f)		9	44	2.5	Italy ?	1840 ?
		S:F.		(g)		26	45	2.5	Venice ?	1840 ?
		B	S.K.-P.D.	(c)		19	79	4	Kremnitz	1784

Legend:

• Obverse types
• Reverse types
• Signatures
• Saltires
• Rarity: C=very common, 1-7: somewhat rare to extremely rare, with 6:up to 10 specimen known to exist; 7:less than 5 specimen known to exist.
• There may always be deviations from the generic description. For example, a common characteristic of reverse type C is that the eagle has 1-3-1 tail feathers; however, variants with 1-2-1 tail feathers are known as well.