Sorry i should have given more info yes they are the old style of a 1979 stern magic.
I haven't been able to source the tubes/displays anywhere i thought they must have been no longer manufactured.
I have seen a few on ebay but would rather replace the displays if possible

Cheers

I brought some tubes from Bumper Action for these displays, not so long ago.  As Nino said you need to know how to solder to replace them thou..