Here are six different worldwide insulators as follows -- Take all six for $25 shipped in the US

U-1435 from Norway (recess embossed on the dome) 1948 NTP in an oval - 5, skirt chip on the side

No U number yet assigned -- Unmarked noser, clean reglue of nose - probably from Italy

U-2051 Very early French Gingerbread Incuse marked C over E in an octagon - ear missing

U-1762 from spain - Incuse marked with what looks like a hand holding a hatchet - Short crack on back (base to wire groove)

U-1804 from Denmark - ink stamped B & G 1911 - Clean reglue three pieces (broken in shipping)

U-2074 from Czechoslovakia No markings -- Reglue five pieces (broken in shipping)