If, in fact, the coins are dated in the Saka Era [78 AD = Saka year 1].
Many of Nahapana's coins are overstruck by Gautamiputra Satakarni, who reigned for 24 years and claimed to have destroyed Nahapana in his 18th year. Nahapana has inscriptional dates 41-46; it's not clear whether these are regnal dates or dates in the Saka Era (or some other era). There are coins from Sind of the Indo-Parthian Satavastres overstruck by Nahapana and coins of Nahapana overstruck by Satavastres; they were probably contemporaries. Sases (Gondophares-Sases) also overstruck Nahapana's coinage in Sind.
Nahapana (circa 50 - 75 AD (?))
AR Drachm
Mitchiner ACW 2684
15 mm.
1.69 gm.
Die position=12h
Obverse: Bust right with close-fitting headdress; Greek legend.
Reverse: Arrow and thunderbolt; Brahmi legend to right, Karosthi to left.
Nahapana (circa 50 - 75 AD (?))
AR Drachm
Mitchiner ACW 2684
17 mm.
2.01 gm.
Die position=10h
Obverse: Bust right with close-fitting headdress; Greek legend.
Reverse: Arrow and thunderbolt; Brahmi legend to right, Karosthi to left.
Rudradaman
AR Drachm
Senior ISCH 325
16 mm.
2.25 gm.
Die position=7h
Obverse: Bust right with close-fitting headdress; blundered Greek legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Rudradaman
AR Drachm
Senior ISCH 325; Mitchiner ACW 2686
16 x 14 mm.
1.75 gm.
Die position=1h
Obverse: Bust right with close-fitting headdress; blundered Greek legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
First dated coins.
Damasena (222 - 236 AD)
Potin or Pb Unit
Dated: Saka 153 (231 AD)
Senior ISCH 340
12 x 14 mm.
1.34 gm.
Die position=2h
Obverse: Elephant right.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi date.
Vijayasena (238 - 250 AD) [as Mahasatrap: 239 and later]
AR Drachm
Dated: Saka 164-169 (242-247 AD)
Senior ISCH 351; Mitchiner ACW 2706v.
16 mm.
2.16 gm.
Die position=5h
Obverse: Bust right with close-fitting headdress; date (Brahmi) behind head. Brahmi legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Vijayasena (238 - 250 AD) [as Mahasatrap: 239 and later]
AR Drachm
Dated: Saka 164-169 (242-247 AD)
Senior ISCH 351; Mitchiner ACW 2706v.
14 mm.
2.21 gm.
Die position=12h
Obverse: Bust right with close-fitting headdress; date (Brahmi) behind head. Brahmi legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Damajadasri III (250 - 255 AD)
AR Drachm
Dated: Saka 177 (255 AD)
Senior ISCH 353; Mitchiner ACW 2720v.
15 mm.
1.98 gm.
Die position=1h
Obverse: Bust right with close-fitting headdress; date (Brahmi) behind head. Brahmi legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Rudrasena II (256 - 274 AD)
AR Drachm
Dated: Saka 188 (266 AD)
Senior ISCH 354; Mitchiner ACW 2729
14 mm.
2.30 gm.
Die position=10h
Obverse: Bust right with close-fitting headdress; date (Brahmi) behind head. Brahmi legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Rudrasena II (256 - 274 AD)
AR Drachm
Dated: Saka 189 (267 AD)
Senior ISCH 354; Mitchiner ACW 2734
15 mm.
2.25 gm.
Die position=12h
Obverse: Bust right with close-fitting headdress; date (Brahmi) behind head. Brahmi legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Visvasimha (277 - 290 AD)
AR Drachm
Dated: Saka 200 (?) (278 AD (?))
Senior ISCH 355; Mitchiner ACW 2744v.
14 mm.
2.22 gm.
Die position=5h
Obverse: Bust right with close-fitting headdress; date (Brahmi) behind head. Brahmi legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Visvasena (292 - 304 AD)
Dated: off flan
AR Drachm
Senior ISCH 357
15 mm.
2.19 gm.
Die position=7h
Obverse: Bust right with close-fitting headdress; blundered Greek legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Rudrasena III (348 - 378 AD)
Dated: Saka 274-279 (352-357 AD)
AR Drachm
Senior ISCH 360
15 x 14 mm.
2.13 gm.
Die position=4h
Obverse: Bust right with close-fitting headdress; blundered Greek legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Rudrasena III (348 - 378 AD)
Dated: off flan
AR Drachm
Senior ISCH 360
15 x 14 mm.
2.12 gm.
Die position=7h
Obverse: Bust right with close-fitting headdress; blundered Greek legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Rudrasena III (348 - 378 AD)
Dated: off flan
AR Drachm
Senior ISCH 360
13 x 14 mm.
2.08 gm.
Die position=6h
Obverse: Bust right with close-fitting headdress; blundered Greek legend.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; Brahmi legend.
Indrada or late imitation
Dated: off flan
AR Drachm
Senior ISCH 365v. (?)
14 mm.
2.09 gm.
Die position=4h
Obverse: Bust right with close-fitting headdress; no legend visible.
Reverse: Three-arched hill (chaitya), crescents and star above, river below; blundered Brahmi legend.
[unknown]
Dated: off flan
AR Drachm
Senior ISCH -
15 x 14 mm.
2.09 gm.
Die position=n/a
Obverse: Bust right with close-fitting headdress; blundered Greek legend.
Reverse: Brockage of obverse.