That there Tippen Delta, of about 1968 vintage and number 149-250302 on the ICR Mainfile, is the Ex. Andy Mutz/Ernie Freestone car which has been in the US for at least 15 years or more now. I'm not quite sure of the timeline but it was originally found in Nova Scotia by Andy Mutz. In about 2001/2002 it was placed on American eBay & was purchased by Freestone for, I believe, $8,000 (then around £7.400) which is still a world record price ever paid for a British invalid carriage. Freestone then restored the car, but with nothing else to go by, unfortunately repainted it the wrong colour (Delta's of that vintage are rather more greeny than the Model 70 Blue it wears now) Also, the brand new hood is black when it should originally be stone. But these are points of digression.
Following the death of Ernie Freestone, the car has since passed through a few hands before being picked up by this Dezer Collection of Miami. Last year (2010) it came over to London in an attempt to sell it via RM Auctions. It failed to sell and so it is back in Miami.
Meanwhile, Ian Hellings has the only other known Delta in America, a 1974 electric version.
The below picture is the Freestone car prior to restoration.