Have a look on the back of the forks and see if the hole is recessed or not. Does look like you need a deep drop one. If it is recessed this is the cheapest deep drop one I could find: http://www.sjscycles.co.uk/sessionID/ONB/product-Shimano-Shimano-R-450-Dual-Pivot-Brake-Calipers-47-57-mm-Deep-Drop-Allen-Key-Fitting-17651.htm
@Sumo started
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Have a look on the back of the forks and see if the hole is recessed or not. Does look like you need a deep drop one. If it is recessed this is the cheapest deep drop one I could find: http://www.sjscycles.co.uk/sessionID/ONB/product-Shimano-Shimano-R-450-Dual-Pivot-Brake-Calipers-47-57-mm-Deep-Drop-Allen-Key-Fitting-17651.htm