Thanks Simon. Yes, they are coated & I found the link showing, 12 X 50 STEPRAY eyepiece focussing discontinued 1948/49.
The seller touts:
"These excellent binoculars are a Ross London-Stepray 12x50 no 146847.The body is in near mint condition, hardly a mark on them. They focus smoothly with nice coated optics which are bright and clear with no chips or scratches,giving a very good picture. They have there original ROSS stamped case and all straps."
I've always been fascinated by the turret porro II & this appears, from here leastways, to be in proper order.
From Europa:
1946 The ROSS advert covered eight pages. On the first page ROSS The British Journal Almanac 1946 announced they were being released from War Work and would return to supplying peace time goods. On the second page it was stated that wherever possible all glass air surfaces would be 'coated'
Then three pages of photographic lenses.One page lists the binoculars available, all coated on lenses and prisms.
The STEPLITE 7X 30, centre focus, £28-05-00
The STEPNADA 7X 30, centre focus, £24-05-00
The STEPLUX 7X 50, centre focus, £35-05-00
The STEPNITE 7X 50, eyepiece focus, £33-05-00
The STEPRUVA 9X 35, centre focus, £27-05-00
The STEPMUR 10X 50, centre focus, £38-05-00
The STEPSAK 10X 50, eyepiece focus, £36-10-00
The STEPSUN 12X 50, centre focus, £39-15-00
The STEPRAY 12X 50, eyepiece focus, £38-00-00
(The STEPRAY 12X 50, eyepiece focus, £1 15s shy of the centre focus Stepsun. Price remained steady the following year)
Nine binoculars listed, 7X 30 STEPLITE at £28-05s, 9X 35 STEPRUVA 1947 Catalogue
£27-05s,, 7X 30 STEPNADA £24-05s, 7X 50 STEPNITE £33-05s,
7X 50 STEPLUX £35-05s, 10X 50 STEPSAK £36-10s, 10X 50
STEPMUR £38-05s, 12X 50 STEPRAY £38-00s and 12X50 STEPSUN
£39-00s.
It would seem the prism arraignment was changed somewhat, in the Stepsun, after the Stepray was discontinued.
Anywho, I certainly look forward to this fine example of postwar production.
Less than an hour prior I had wagered similar amount on a 1919 Zeiss 10x50 Porro II that had no case/straps and looked, for what the low resolution pics revealed, to be much worse for wear and in questionable viewing condition.
I'm glad someone thought more of the jerryglass as I couldn't quite afford the twain.
ETA: I have found myself singing a few bars whilst awaiting the Ross Stepray.
Rule Britannia!
Britannia rule the waves.
Britons never, never, never will be slaves.
Cheers.