cover 9Kr. dull blue-green (1850), two examples both with good margins on uncreased 1851 entire from Ludwigshafen to Cöln, cancelled by cogwheel "190" and showing half circle origin d.s. (28/8) and script "Rh. Baiern" h.s. adjacent. Fine and scarce. M.5aa. Sem D.M. 1300. Photo