DURCH! THROUGH! Mitteilungen, Messages or maybe notifications. But I like messages. The artist is probably Adolf Hering, same artist and graphics guy that painted "Der Tod und das Mädchen". One of my favorites from your post cards. "I like spacey's explanation". As he explained, notice the winged helmet,reminds me of Mercury or the artists Germanic interpretation of this type of pagan god and it looks like a canister on his back? But instead of holding a caduceus, he's holding a sword to protect that message or possibly to deliver a strong one? And riding his horse through the water as if breaking through the lines. Artists heroic interpretation of a dispatcher on horseback? Great stuff. Thanks spacey and thanks for showing it Dean.