coveron piece May 11 to May 31, the selection of entires (10), part entires (3) and pieces (2) variously bearing examples from plates 1a, II and III, showing clear datestamps for May 11 (2), 12, 13 (2), 14, 15, 16 (2), 18, 20, 24, 29, 30 and 31; fair to fine