Cat. | Mint Unhinged | Fine Used | ||||
40c | Geothermal Electricity Generation | 296a | $0.90 | $0.70 | ||
60c | Fossil Fuel Electricity Generation | 296b | $1.15 | $1.15 | ||
70c | Gas Electricity Generation | 296c | $1.45 | $1.45 | ||
80c | Hydro Electricity Generation | 296d | $1.60 | $1.60 | ||
Set of 4 | 296e | $4.85 | $4.65 | |||
First Day Cover - 13 January 1988 | 296f | $4.25 | ||||
… Four Stamps : 40c (296a), 60c (296b), 70c (296c), 80c (296d) | ||||||
Silk First Day Cover - 13 January 1988 | 296g | $15.30 | ||||
… Four Stamps : 40c (296a), 60c (296b), 70c (296c), 80c (296d) |