21 (21) 1915 2½d on 20pf ultramarine Kaiser's Yacht of German New Guinea, G.R.I. overprint, second setting (5mm), unwmkd, perf 14, given this stamp's scarcity it is doubtful that more than parts of two panes were printed, a rare and difficult stamp, undercatalogued, the "key" pfenning value for the second setting, a rare in any event, but substantially more rare used than mint!, we do not recall ever having a used example pass through our hands before, signed Bothe and several others.
