Parts (2 No) of a wrought iron edge rail found in the River Irvine immediately downstream of Laigh Milton Viaduct on the former Kilmarnock & Troon Railway during its refurbishment in 1995. A short section of 25 mm length has been cut from the original length.
May possibly have superseded the cast iron plate rails (see item 95/007) used on the railway until about 1846.
For an article on the viaduct and its restoration see http://www.engineering-timelines.com/scripts/engineeringItem.asp?id=1243.
For a detailed paper on the viaduct and its restoration see here.