| The extra large printing of the first issue (over 37,000), which was undertaken because of uncertainty concerning the viability of the local carriage service in general, made it possible to use the leftover stock as the basis for the 10th anniversary issue. One line of seven stamps was overprinted "1971-1981" and the succeeding line was overprinted "10th YEAR." | |
| The overprint was applied to 3,000 sets, with 500 first day covers. |
| Index | Return | |
