Sierra Leone SG184c 1935 Silver Jubilee 1r Lightning Conductor on Cover

1935 (6 May) envelope registered to Switzerland bearing the set the 1/- value showing variety lightning conductor each cancelled by oval registration c.d.s. the 1/- with one slightly pulled perf. at foot otherwise generally fine and scarce First Day Cover. S.G. 184a (475 pounds as a used stamp).