Diaphragm fitting rings which were used as trial sizes to check for comfort and fit before a CAP was prescribed.

Each of the orange rubber rings is marked Ramses with a trademark encircled “R” and with the size of the ring in mm. The box is marked “Ramses TM. Reg. US & Can Pat. Off. Fitting Rings”. An attractive vintage piece set in a “Deco style” bakelite box which displays beautifully.

• From the Phisick collection