Vintage B.R. ( British rail) look out enamel arm band original not reproduction great piece of railwayana amazing condition with original leather strap some minor age related wear 
10 cm wide 
8 cm tall
Oh this is a brilliant piece of British railway history — and a lovely clean example too.
Here’s a detailed description you can use:
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Vintage British Railways “LOOK-OUT” Arm Badge with Leather Strap
A striking and now hard-to-find British Railways (B.R.) safety lookout arm badge, complete with its original adjustable brown leather strap and brass buckle. The enamelled metal badge is boldly printed in red with the words “B.R. LOOK-OUT” inside a double-line oval border — designed to be instantly visible and clearly identifiable while trackside.
These badges were issued from the mid-20th century onwards (British Railways 1948–1997) and worn by the appointed Lookoutman — the worker responsible for warning track crews of approaching trains. Before modern electronic warning systems, this role was vital in preventing accidents, making this badge a powerful reminder of the human side of railway safety.
Maker & History
Although not always stamped with a maker’s mark, many of these were produced under contract for British Railways by industrial signage and enamel firms in the UK. British Railways itself was formed in 1948 when the rail network was nationalised, later becoming British Rail in the 1960s. Equipment such as this was standard issue across the network right up until privatisation in the 1990s.
The use of enamel ensured the badge remained visible in all weathers — while the curved metal plate was designed to sit comfortably and securely over the wearer’s arm using the thick leather strap, even during manual labour.
Condition
From your photos:
The enamel retains a lovely clean white ground with bold red lettering.
Minor surface marks and light scuffs, fully consistent with age and genuine use.
The leather strap shows natural wear, softening and patination — exactly what collectors love to see in an authentic working piece.
Buckle hardware appears original.
Overall, it presents beautifully — a proper “real world” relic rather than a reproduction.
A Wonderful Display & Collectors’ Piece
Perfect for: ✔ Railwayana collectors
✔ Industrial heritage lovers
✔ Display in a study, man-cave, office or themed interior
✔ Stage/film prop use
It’s one of those tactile pieces that instantly tells a story.
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Suggested Price / Value
Values depend on condition and strap originality — yours appears complete and very presentable.
Typical selling range in today’s market (UK):
£45 – £75
(Trackside heritage is a strong niche — and British Rail nostalgia always performs well!)