Radio Display Bulb

I have Discovery and I have a genuie land rover philips radio cassette fitted on the Discovery. The radio cassette is a philips RC 228 and the display is illuminated by a miniature bulbs which have no proper holder, but they have a green cover which surrounds the globe and the flying leads are simply soldered to the printed circuit board. I need to replace this bulb since it does not light any more. Do anyone know the wattage of these miniature bulbs that have a green cover which surrounds the globe.

Thanks

0.2

Thanks for your reply