Unidentified Spanish cob?

I'm curious about this one's origins... but can you also tell me what the image is supposed to be on the front image (I recognize the structure on the back as a castle-type-building... but all my untrained eyes see on the front is something out of a Rorschach test). Thanks!

 

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Spain, 4 Maravedis of Philip III, Segovia Mint. Issued 1602-1620.
Obverse: Castle, Aqueduct mintmark(Segovia) left, denomination IIII right.
Reverse: Lion rampant left.(rotate image 180)

http://www.ma-shops.com/mpo/item.php5?id=5501

 

Thank you DCH! And, I'll keep looking for the lion rampant until I see it. :O)