Until the mid 70', only Echo Super Vamper harps were available in Europe whereas they were strickly identical to the Marine Band that was at the same time sold in US. Only the engraving on the upper coverplate differed. There was also a 12-hole version called simply the Echo Vamper and it was identical to the more recent 12-hole Marine Band 364, except once again for a slightly different engraving on the upper cover.