MK V 18", Standard, Deluxe, and Antique Finishes All Items Here are all the products in this category: 18" Antique MK V Dive Helmet 18" Antique Finish MK V Dive Helmet $ 975.00 18" Deluxe MK V Dive Helmet 18" Deluxe MK V Dive Helmet $ 790.00 18" Standard MK V Dive Helmet 18" Standard MK V Dive Helmet $ 495.00 Nautical Desk Set-Helmet 10" Wide Wooden Desk Set $ 59.00