In the seller's ( Not me) own words on Etsy. "Unique 1961-62 Gillette All Nickel Heavy Tech Set Complete Shop Display.
This is an ultra rare if not unique complete shop display set of six 1961-1962 Gillette Heavy Tech No.21 ‘bathroom’ cases.The Razor components are all nickel plated brass with the solid Heavy knurled handle. No aluminium or stainless steel!
Marked Gillette, Made in England on the guard & acid etched Gillette on the cap.
About 80mm long & a solid 60g weight."
Well who'd have thunk it! another rare old tech. This time it's an all brass spiral tech. Gillette England ploughed their own furrow in those far off dys Here's my and pjgh's , English 58/61 all brass solid handle, brass and nickel Transition Tech, named the German tech "Sonderangebot" on Mr Razor's site. These razors weigh 72 g ,whilst an English aluminium handled, brass upper plate, brass bottom plate spiral tech weighs in at 32g This makes me wonder if the razors on Etsy may have an aluminium component in them after all, or maybe the brass handles are hollow? Hmmmm.