The one most of us had; SAP 50, black body, brown faux crocodile grips, plain (thin) trigger; later versions have a moulding on the trigger to make it more comfortable.
Carded Sekiden with gold beads
Mk2 classic with larger smooth grips and cushioned trigger. Gold beads indicate later UK issue.
Classic box
Tied with thin brown cord, 11.5 x 6 x 3 inches
Shop display open
When opened the card lid had a cutout to form this attractive display. Makes surviving boxes rather flimsy. These are classic Sekidens although not bagged. From the US and Canada.