Only about 55 Qs were made by W6ODD/CR8 from the long-deleted Portuguese India enclave of Diu in 1948.
Here's DXing's rarest card:http://hamgallery.com/qsl/deleted/Damao_Diu/w6odd.htm
Note W6ODD/CR8's rig: HQ129 receiver and a pair of 807 tubes running about 30 watts into a wire. Not exactly a portable rig!
Reportedly W1FH was calling CQ (at 10:34z!) when the CR8 answered him!