01
Selenium Power
Operates without batteries using an integrated light-sensitive selenium cell.
Curio Gallery
01 / 02
01 / 02Weston Master II Universal Exposure Meter Model S141/735 — photograph 1
Highlights
Why this object
still matters.
The Weston Master II is an analog universal photographic exposure meter housed in a molded black phenolic case. It features a dual-range dial system coupled to a hinged perforated baffle over a selenium photovoltaic cell. This unit includes its original tan leather case with velvet lining and neck strap.
02
Dual-Range Baffle
Hinged rear baffle shifts the galvanometer scale between high and low light levels.
03
Sangamo Weston Craft
Manufactured at the Enfield plant under UK patent 531996.
04
Calculator Dial
Circular slide-rule computer converts light values to shutter and aperture pairs.
05
Fitted Case
Supplied with an original tan leather pouch featuring plum-colored velvet lining.
06
Complete Markings
Retains original specification plate with serial number A 12322 clearly stamped.
Specifications
The useful facts,
clearly recorded.
Measurements, construction, identity, and seller-supplied details are kept together for direct comparison.
Reviewed · Curio catalogue
Maker
Sangamo Weston Ltd., Enfield, Middlesex
Origin
United Kingdom
Year
1946
Department
cameras
Packed shipment
2 kg · 35 × 25 × 20 cm
Model
Master II (Model S141/735)
Serial Number
A 12322
Patent Number
531996
Sensor Type
Selenium photovoltaic cell (battery-free)
Measurement Range
Dual scale with hinged baffle
Details
Close inspection,
recorded in photographs.
Detail № 01 · Weston Master II Universal Exposure Meter Model S141/735 — photograph 2
Heritage
A traceable life,
carefully recorded.
Provenance documentation was not supplied for this specific Weston Master II Universal Exposure Meter Model S141/735; this listing is based on the supplied photographs only.
Optics & Design
Dual-Range Photometry
Visible in photo three, the hinged baffle flips open to expose the honeycomb selenium cell for dim lighting, while closing the perforated flap restricts light for bright daylight measurements without needing separate neutral-density filters.
Manufacturing Heritage
Precision Enfield Engineering
Visible in photo two, the stamped Sangamo Weston plaque documents the Enfield factory's role in precision instrument making, delivering reliable post-war photographic meters that operated independently of external battery power worldwide.
Timeline
An object in time,
one continuous story.
1939
Weston Master Introduced
Original Master universal exposure meter establishes industry standard.
1945
Master II Development
Redesigned slimmer body and updated calculator dial launched.
1946
British Production
Sangamo Weston begins manufacturing the Master II in Enfield, Middlesex.
1956
Succession
Replaced by the Weston Master III with updated film speed scales.
Condition
Honest wear,
documented clearly.
The exposure meter shows light cosmetic wear consistent with age, with intact black casing and legible dial markings. The selenium cell lens array is clear, and the rear baffle hinges smoothly. The fitted tan leather case shows surface rubbing, edge wear, and intact stitching with an operational snap.
✓
InspectedCasing & Dials
Black body and aluminum calculator dial show mild surface handling marks without structural cracks.
✓
InspectedPhotocell & Baffle
Rear hinged perforated baffle operates properly, revealing an intact honeycomb selenium grid.
✓
InspectedMeter Scale
Front galvanometer window is clear and legible with 'Made in England' and model text intact.
✓
InspectedLeather Case
Original tan leather case displays surface patina, intact purple velvet lining, and secure straps.
Logistics
Inspected, insured,
door to door.
Step 01
Delivery
Inspected, photographed, and packed with its condition report.
Step 02
Shipping
Custom-fit protective packing with tracked, insured courier service.
Step 03
Returns
Return requests are accepted within fourteen days of confirmed delivery.
Step 04
Dispatch
Prepared for courier handoff within three to five business days.
Acquisition
Make it part of
your collection.
Contact the seller for more information or to discuss this object.
✓ Insured Shipping✓ 14-Day Returns✓ Condition Report✓ Reviewed Listing
Weston Master II Universal Exposure Meter Model S141/735