This huge 60 inch Surrey Machinists bicycle may be one (or two) of a kind.
When I first saw it, I believed that the reinforcements of the frame were developed aspecially for this tall size. Look at the spring and the rear fork crown. But later I found a much smaller model (48 or 50 inch) with the same construction! (click here for link)
The wheels have tangent spokes and the handlebars have 'spade grips', which were really en vogue around 1888-1892.
You can see this impressive bicycle in the Velorama museum. Rear hub is not original, look at the other bicycle to see that.