In 1959 Luger introduced three 16' all-fiberglass models to their customers.  The models' hulls were similar, but varied slightly in seating and deck arrangement to appeal to the widest variety of customer needs.  Permanently molded-in deck colors were available in Tropical Coral Red, Harbor Green, or Bali Blue.  The hull color was available in white only.

My Sierra 16 was purchased by its original owner/builder in 1965, but was not registered until 1966.  The builder registered the boat in New Jersey as a homemade watercraft.  New Jersey's impressed HIN "tag" on the transom states, NJX.  The boat and trailer titles indicate a 1965 date of manufacture.

A Sierra boat kit would have arrived as three basic fiberglass parts:  The Lower Hull, Upper Hull and Deck.  The Deck would first be placed up-side-down (as seen in photo above) and the white Upper Hull piece would be placed on The Deck - the flanges of each unit were molded to interlock with one another. 

The assembled Deck and Upper Hull unit would have been slipped into position with the Lower Hull.  The molded sections were designed to quickly slide into proper position and alignment.  Using a screwdriver, the stainless steel fasteners would hold the assembled pieces tightly together. 

The boat's builder could then turn the boat right-side-up, and install the transom and bond the molded fiberglass sections into a one-piece "Molded Fiberglass Boat".  Factory pre-cut 3/4" marine plywood inner and outer transom pieces were then screwed together with the fiberglass core between them. 

The next steps involved brushing the bonding materials into the strips of supplied fiberglass.  The saturated strips were laid over the interlocking joints.  After proper curing, the seat supports and seats, rear decking, flooring, and windshield could be installed.  Final touches were added with any Luger custom accessories ordered with the boat kit.