Austrian KK issue 1861, 15 kr on fragment, oval red cancelled K.K. BRIEF-FILIALAMT RECOMANDIRT (red ink for registered mail in WIEN). Mueller type RzO-fy, year erased on issue III Michel #22.
K.K. Post
1861ca (scan 2012-07-25)
<span class="int-own-work" lang="en">Own work</span>