The Argonaut is a Heavy Tackle lure with 12" sized skirt saddles. The head shape is a fairly long but mostly slender angle nosed plunger with a slight front and rear taper.
BOM Skirt Size 602.
From "Bonze" Fleet on the Argonaut:
"This Angle faced Plunger has been developed in conjunction with sport fishermen from around the globe. Instrumental in some outstanding catches, the Argonaut has become a favourite and one of the most consistent lures. Outfitted with a Kahawai skirt pattern, this lure gets more than its fair share of action, especially with the West Coast Striped Marlin of New Zealand. Skirted Length: 400mm / 15.75” Hook Size: 10/0 – 11/0 Leader Size: 400lb – 600lb."
This particular head is from their "Custom" lineup in with a black rainbow-iridescent fish scaled wrap covering the insert with a set of red flashy eyes. Skirted in blue with aurora & black bars/silver glitter over black/blue with a yellow lateral line.