Sri Lanka, 1870 AD., Ceylon, Calcutta mint, ¼ Cent, KM 90.

Ceylon, Victoria, engraver: William Wyon, Calcutta mint, 1870 AD.,
Quarter Cent (ø 14,3 mm / 1,20 g), copper, 1,18 g. theor. mint weight, mintage 200.000 , axis medal alignment ↑↑, plain edge,
Obv.: VICTORIA / C.M. / QUEEN , young profile of Victoria facing left wearing a diadem. A fret border two times broken by the legend along periphery. Initials of mint C.M. incuse on the truncation of the neck. Varieties occur with letters on truncation divided by a space thus C M.
Rev.: CEYLON · QUARTER · CENT / · 1870 · / 1/4 සතය – சதம் , denomination outside circle, Talipot palm tree and Sinhalese and Tamil lettering within (left Sinhala ¼ satheyer - right Tamil …. , translation: 1/4 [of] one cent).
KM 90 ; Pridmore 245 . http://coins.lakdiva.org/british_ceylon/victoria_1Qc.html

Year / Mint Mark / Mintage
1870 / C.M. / 200,000
1870 Proof
1890 200,000 3.89
1890 Proof
1891 Proof
1892 Proof only
1898 160,000
1898 Proof
1901 216,000
1901 Proof

Pridmore Year Alloy Issue Mint Proof Silver Gold
245 1870 Cu 200,000 Calcutta 245A 245B 245C
246 1890 Cu 200,000 Calcutta 246A
1891 Cu None Calcutta 247 247A 247B
1892 Cu None Calcutta 248
249 1898 Cu 160,000 Calcutta 249A 249B
250 1901 Cu 216,000 Calcutta

The weight is based upon the earlier sterling quarter fathing.