Bio Gas Production

20 ₹ 1988

India

0.11 - 0.13$

price on 21.03.2023

Commercially used forgeries of this stamp exist on unwatermarked paper and perforated 10½ line.

Science and Technology

Petrol Pump Nozzle (Oil Conservation) 0.1$	House, Heads and Flowers ("Family Welfare") 0.15$	Television Set, Dish Aerial and Transmitter	Television Set, Dish Aerial and Transmitter
Television Set, Dish Aerial and Transmitter	Bio Gas Production 0.11$	Television Set, Dish Aerial and Transmitter	Solar Energy 0.06$
Family Planning	Indian Family 0.1$	Windmill (Wind Energy) 0.45$