Head light parking bulb

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I,am looking for a parking bulb that is in the headlight bucket on my Norton 400 electra. It is a small screw in type. The only markings on the bulb are Royalite 12v-3w. Thanks Jack
 

L.A.B.

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I tried NAPA no luck ! No markings with BA9s. Thanks Jack

BA9S is a bayonet bulb.

Your "screw-in 12V-3W" bulb could possibly be an E10 (MES).
Example:
eg23.jpg

 
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I miked the outside of the threads at .367 which comes out in mm at about 9mm. The length
is not an issue. The smallest I have found is a 11mm threaded base. Still Looking ! Thanks Jack
 

L.A.B.

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I miked the outside of the threads at .367 which comes out in mm at about 9mm.

.0367"/9.32mm sounds about the right diameter for E10 (.370"/ 9.3mm).
e10-e12-e14.jpg


1355821914089.jpg




The smallest I have found is a 11mm threaded base.

E11?
light_fitting_chart_screw_765x.progressive.png.jpg
 
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i'll have a midget screw please, with a special one on the side .... sorry couldn't resist
 
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Checked out the E-10 bulb I think it is the size I need as far as fitting but it is only 1.5w, half of what I have at 3w. Still looking ! Thanks Jack
 
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