India, Republic, 2004 AD., 150th anniversary of the Indian Postal Service commemorative, Kolkata mint, 1 Rupee, KM 321.

India, Republic, 150th anniversary of the Indian Postal Service commemorative issue, Kolkata (Calcutta) mint, 2004 AD., (issued on 4th October 2004),
1 Rupee (25 mm / 4,91 g), stainless steel (83 % iron, 17 % chromium) , 4,85 g. (?) theor. mint weight, mintage ? , medal alignment ↑↑ (0°), milled edge with small circumferential grooves, weak strike,
Obv.: भारतीय डाक INDIA POST / 150 / वर्ष YEARS / 2004 , partial postage stamp with the logo of India Post at upper right, legend "Bharatiya Dak" and "Varsh" in Hindi, date below.
Rev.: भारत INDIA / सत्यमेव जयते / रुपया 1 RUPEE / * , ("Bharat" INDIA / Satyameva Jayate" / "Rupaya" 1 RUPEE) , Ashoka Lion Capital in center, motto "Satyameva Jayate" below ( सत्यमेव जयते; literal "Truth Alone Triumphs"), country name and denomination in Hindi and English.
KM 321 .

unknown mitage, no mintmark:
(no mint mark) = Kolkata (Calcutta)

Year / Details
2004 Calcutta
2004 Calcutta , proof issue, in sets

The first Postage Stamp of India, for use in the entire country, was issued in 1854.