hifi engine

Lamp Replacement for Sansui R-411

I have a Sansui R-411 that has the blue dial lamp burnt out. I’d like to replace it but I’m unsure of the lamp type and voltage to look for online. I just know it’s not the fuse-style lamp. I’ve also looked at the R-410 service manual on here which didn’t have the information I was looking for.

What replacement lamp should I be looking for?