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The 6-start oil pump (NM25396) appears to be a development performed at Bracebridge street. The part number indicates it was developed after the 750 head, thus probably late 1961 / early 62. Series production of the pump didn't commence until 1965 at Plumstead. It seems likely you have a trial sample - maybe your bike was a testbed for future developments? The time spent between dispatch and sale may indicate the bike was used for road testing. Did it have mileage on the odometer?-Knut
The 6-start oil pump (NM25396) appears to be a development performed at Bracebridge street. The part number indicates it was developed after the 750 head, thus probably late 1961 / early 62. Series production of the pump didn't commence until 1965 at Plumstead. It seems likely you have a trial sample - maybe your bike was a testbed for future developments? The time spent between dispatch and sale may indicate the bike was used for road testing. Did it have mileage on the odometer?
-Knut