There are very few representations of the Cnidia on ancient coins (here a very rare coin of Caracalla and Plautilla from Cnidus), and none that I know of with an attendant Eros added.
Here is the Cnidia on a similarly rare coin of Diadumenian from Midaëum in Phrygia (photos courtesy of Lübke & Wiedemann KG).
Much commoner on the coins are images of the post-Praxitelean Aphrodite Pudica, where the goddess is represented shielding the “shameful” parts of her body with her hands. Many variant copies of this statuary motif have survived, the two most famous being the Capitoline Venus in Rome (left) and the Medici Venus in Florence (right):
As an example of the type on coins, here is a sinuously elegant Aphrodite from Apollonia in Illyricum, with Julia Domna on the obverse.
Aphrodite Pudica with an attendant Eros is found on coins of Nicopolis ad Istrum and Tomis in Moesia; Anchialus in Thracia; Sicyon in Achaea; Sinope in Paphlagonia; Hadriani ad Olympum in Mysia; Saïtta in Lydia; and Ptolemaïs-Akko in Phoenicia.
Nicopolis ad Istrum in Moesia, attractive coins of Julia Domna issued by the governor Aurelius Gallus.
Æ 26. Obv. IOYΛIA ΔOMNA CEBA. Draped bust of Julia Domna r. Rev. YΠA AYP ΓAΛΛOY NIKOΠOΛITΩN, ΠPOC I in exergue. Aphrodite of the Capitoline type standing facing, to l. Eros standing facing, head r., with wreath in his l. and torch in his r., both held downwards (Private collection, photos by permission).
Tomis in Moesia, coins (tetrassaria) of Elagabalus, with Eros bearing a wreath flying l. from a column towards Aphrodite, a dolphin behind her.
Æ 27, 15.6 g. Obv. AYT K M AYP ANTΩNEINOC. Laureate, draped bust of Elagabalus r. Rev. MHTPO PONTOY TOMEΩC. As described above (Photo courtesy of marcvs_aurelivs_caesar).
Anchialus in Thracia, coins of Maximinus I, with Eros on a dolphin to l. of Aphrodite.
Æ 25, 7 h, 11.15 g. Obv. AYT MΑΞΙΜΙΝΟC ΕΥCΕΒ ΑΥΓ. Laureate head of Maximinus I r. Rev. ΟΥΛΠΙΑΝΩΝ ΑΓΧΙΑΛΕΩΝ, the two ΩΝs as WN in ligature. As described above.
Æ 23, 8.66 g. Similar (Photos courtesy of Numismatik Naumann GmbH).
Æ 24 (2 assaria), 3 h, 5.78 g. Obv. AY • KAI Λ • C-E CEBHPOC. Laureate bust of Septimius Severus r. Rev. CIKYΩNIΩN. Eros r. on a low base, leaning on a downturned torch and holding out a fillet to Aphrodite standing l.
Sinope in Paphlagonia, a rather unusual coin of Maximinus I, with reverse type of Aphrodite Pudica or Euploia standing facing, head l., to the l. a dolphin (?) carrying a portable altar with an apple on it (?), to r. a small Eros standing l. The coin is dated 305 of the Era of Sinope (= 235 A.D.). There is a similar reverse—though without Eros—on a coin of Plautilla from Pautalia in Thracia (Varbanov 5291, Ruzicka 768—both of whom describe the altar as a column surmounted by a globe).
Æ 21, 6 h, 4.67 g. [Obv. IMP MAXIMINVS AVG. Laureate bust of Maximinus I r.] Rev. [C(olonia) R(omana) I(ulia) F(elix) S(inope) AN(no) CCCV]. As described above (Private collection, photos by permission).
Hadriani ad Olympum in Mysia, a coin of Julia Domna (not illustrated), with Eros standing to the r., facing l., and bearing an uncertain object, possibly a torch.
Æ 26, 10.16 g. Obv. KΛΩ CEΠ • AΛBEINOC KAICAP. Bare-headed bust of Clodius Albinus as Caesar r. Rev. EΠI ANΔPONEIKOY APXA CAITT-, HNΩN in field. As described above (Photos courtesy of Classical Numismatic Group, Inc., www.cngcoins.com).
Ptolemaïs-Akko in Phoenicia, an extremely rare coin of Philip I (not illustrated), with Aphrodite, Eros on a dolphin to l., within an aedicula.
References: Hristova/Jekov 220.127.116.11; Pick, AMNG, 1455; Bernhart, Aphrodite, 241; Varbanov 2900
Rarity: Very common
References: Pick/Regling, AMNG, 3062; Bernhart, Aphrodite, 256; Varbanov 5175
Anchialus / Maximinus I
Reference: Bernhart, Aphrodite, 257
Reference: Bernhart, Aphrodite, 254
References: Bernhart, Aphrodite, 242; Mionnet II, 48
References: RPC IV, 1397; Bernhart, Aphrodite, 243; Imhoof-Blumer, Lydische Stadtmünzen, 6; SNG von Aulock 3095
References: RPC IV, 1398; Bernhart, Aphrodite, 244; Imhoof-Blumer, Lydische Stadtmünzen, 6a; SNG Righetti 1068
Reference: Bernhart, Aphrodite, 245
Reference: Imhoof-Blumer, Lydische Stadtmünzen, 7
Ptolemaïs-Akko /Philip I
Reference: Bernhart, Aphrodite, 263