To help shed a little more light. At that period in time Colt had two manufacturing facilities, one in the USA and the London location (established 1853). The London factory resulted, in part, due to the overwhelming response the Colt Exhibition of 1851 received at the London Crystal Exposition Palace. The London factory was opened nearly two years prior to Colt's completion of their new USA facility in NH. The London Agency was the distributor for the London factory. The factory did produce firearms, e.g. London Navy Models, etc., and also received shipments from the USA. Shipments of completed revolvers from the USA would ship to Colt's London factory. Once there, they would be made ready. Made ready would involve inspection, GB proofing, caliber adjustments if required, e.g. Eley, etc., special finishes, basically made ready for shipment to, or to fill orders from, the London Agency. One interesting item involves the Model 1860 trigger guard. Colt USA produced the 1860 with a brass trigger guard. Colt London would replace the trigger guard with blued steel due to the fact the British customers thought the brass looked out of place. Colt was in business to make and sell firearms. Colt USA letters reflect what processes (think build sheet) were completed, and to whom the piece was shipped to (distributor). Colt London would in turn have a build sheet listing what had been done to the imported item. It was not uncommon for a Colt USA revolver to be sent to Colt London and then be worked on again prior to their shipping to their distributor (London Agency) for customer sale as ordered. As far as the rubber versus wooden grips, that could have transpired at the London agency upon customer sale and inspection. Not all shoulder stocks were made by Colt USA or Colt London. Shoulder stocks were often made by other vendors for Colt. (I have seen shoulder stocks that sold for much more than the revolvers they were with.) The same holds true for wooden presentation boxes. The pics appear to show a nice piece from the period, and should bear further inspection and research. The dollar amount invested seems fair enough, based only at seeing the pics. If the revolver, shoulder stock, and presentation case are all Colt manufactured, the trades he has invested may very well be worthwhile.