We searched for“Francis Barker Prismatic Compass M73”(identified as Francis Barker M73, confidence: High)
Typical realised range (Gemini estimate): £60-£180
Comparables
18
Median
£170
Suggested estimate
£140 – £190
25–75% range
£140 – £225
Overall range
£20 – £623
Distribution
Median from 17 sold (all-time — too few recent sales)·hammer prices, excl. buyer's premium — fair-market auction value (retail/insurance replacement runs higher)
