India, Republic, 1951 AD., Mumbai mint, half Rupee, KM 6.1.

India, Republic, Mumbai mint, 1951 AD.,
½ Rupee (ø 24 mm / 5,91 g), nickel (magnetic), 5,83 g. theor. mint weight, mintage 9.239.000 , axis medal alignment ↑↑ (0°), reeded edge,
Obv.: GOVERNMENT • OF • INDIA *, Asoka lion pedestal between 2 arcs, state name around, 5 pointed star at bottom (big Asoka arms type).
Rev.: आधा रुपया / / RUPEE / 1951 / ♦ , legend in Hindi / Devnagari (AaDaa rupayā) on top, value flanked by stalks of wheat, date and Mumbai mintmark below (small year type).
KM 6.1 .

Year / Mint Mark / Mintage
1950 1,100,000 KM#6.1 (Calcutta Mint; large lion)
1950 ♦ 12,352,000 KM#6.1 (Mumbai Mint; large lion)
1950 ♦ KM#6.1 (Mumbai Mint; large lion) Proof
1951 ♦ 9.239.000 KM#6.1 (Mumbai Mint; large lion)
1954 36,300,000 KM#6.2 (Calcutta Mint; larger date and large lion)
1954 ♦ KM#6.2 (Mumbai Mint; larger date and large lion) Proof
1955 ♦ 18,977,000 KM#6.2 (Mumbai Mint; larger date and large lion)
1956 24,900,000 KM#6.3 (Calcutta Mint; dots missing between words)