We searched for“Shell 1935 porcelain enamel advertising sign petroliana”(identified as Shell, confidence: High)
Typical realised range (Gemini estimate): £300-£1800
Comparables
443
Median · 1935
£15,204
25–75% range
£3,777 – £36,131
Overall range
£144 – £46,530
Distribution
Median from 6 sold (all-time — too few recent sales)·hammer prices, excl. buyer's premium — fair-market auction value (retail/insurance replacement runs higher)·few sales — treat as indicative
