Optimus No.1 pre-1915 (but close)

Discussion in 'Optimus No:1(inc. S & J)' started by igh371, Aug 15, 2018.

  1. igh371

    igh371 SotM Winner Subscriber

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    DSC07511.JPG
    Another all-though pump pre-1915 standard domestic Optimus No.1, but in this case seemingly made later than this example, and consequently much closer to the point when feet were added to the legs, which they were by 1915. The big changes which clearly place this one a little later than the example linked to above are the absence of the 'Patent' marking from the tank top, and the side panel inscriptions which are now the same as found on 1915 and later 1s & 5s (e.g.). Beyond these points the short-lived incuse filler cap and pressure release screw markings are also indicative of this period.

    DSC07516.JPG DSC07519.JPG DSC07520.JPG DSC07521.JPG DSC07513.JPG DSC07512.JPG DSC07518.JPG DSC07517.JPG DSC07515.JPG

    Burning post-fettle was initially quite dramatically off-centre as well as indicative of a worn jet:
    DSC07522.JPG DSC07523.JPG

    The jet proved to be the source of both problems, I've never seen one with the jet hole itself quite so out of place:
    DSC07525.JPG but with the jet replaced all is good -

    DSC07526.JPG


    @OMC @gieorgijewski
     
  2. igh371

    igh371 SotM Winner Subscriber

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    Here is another which seems to have exactly the same specification and features as above.
    @Andrew29
     
  3. Tony Press

    Tony Press Australia Subscriber

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    @igh371

    Thanks for posting.

    Tony