You have a very nice (for the type
quarting issued by Sigismund of Luxembourg as King
(1387-1437) sometime between 1430-1437. I have seven of these with various mintmarks
in my personal gallery
, which contains more background about the coin. Here is a link to one of them: http://www.forumancientcoins.com/gallery/displayimage.php?pos=-106356
. I don't have my copy of Pohl
with me; when I get a chance over the weekend (if I forget, send me a reminder) I'll look up the mintmark
for you and provide what information I can.