Does this shape appear in other series?  No, but there are un-numbered examples stamped to base  Baitz Exclusive Liqueur.

It is believed these were sold in a matched set with small glasses. Various shapes of glasses are recorded, none of them numbered. See Later Series 160.

Height;  14 - 15 cm without stopper, 15.5 - 17 cm including stopper.

Bases incised 165

Un-numbered.  Bases stamped  Baitz Exclusive Liqueur

Foil label on flask reads  "Baitz Exclusive Liqueur. CURACAO ORANGE"

     Collection; John Fortuna

'Pirate head' stoppers, thought to have been fitted to some flasks as originally sold. Ceramic, but not by Premier, possibly Japanese.

With un-numbered liqueur glasses; see Later Series 160

Just what the 'barbeque plate' is doing here is unclear.

A shallower version of Later Series 170.

(The mystery doesn't end there either.

At this point in the Later Series shape books, seven shapes numbered 500 - 506 are inserted, between nos.165 and 166.)