The co-ords are for the New Barn Village sign and not the cache itself. In order to find the cache solve the simple puzzle below.
New Barn is a compact residential area surrounded by open fields which lies four miles southwest of Gravesend. It is in the local government district of Dartford. New Barn is larger in population than Longfield, although has little in the way of services, being a recent development and purely residential in nature.
Historically New Barn was divided between the parishes of Southfleet, Longfield and Northfleet. In the centre of New Barn lies New Barn House, a 16th-century timber framed building, which became a Grade II listed building in 1982. On 19th century maps this was shown as New Barn Farm. Much of the grounds (including the well have been sold and developed as the residential cul-de-sac of Bentley Close.
According to the Kent (District Boundaries) Order 1987 the population of the part of New Barn formerly in Gravesham was 775, while the population of the part already in Dartford was 1,920. New Barn is on a hill, height 303 ft. on the north side of the dry valley of Longfield.
The cache can be found at:
N51 23. Centenary that New Barn House built, times 3, plus 5
E0 17. New Barn population in 1987 (Gravesham part), plus 69
This is believed to be the first 4.5T village sign and, although not too difficult to get to, please be careful.