Hi Barry,
Burton, "Book of the Sword" (1884, p.167-69)...a steel of 30" rising from a handle of black wood, and kept open by a spring....compared it to a European razor.
Excellent observation on the shape though!! It seems like these 'razors' must have been like huge navajas (actually this was how navajas began, with barbers).
All the best,
Jim
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