Just bought this Bird Wren off ebay. Tickled pink to get it. I've been looking for an early Wren forever. I wanted the single downtube frame version from around 1961 or 1962 but this will suffice for now. Not sure what year this one would be. I assume this model still used the Clinton Panther engine but the sprocket is on the opposite side on this one. Anyone know what year(s) this one would be and the correct motor? Thanks.