I have had a Sekonic 398 operating since the 70s and it is doing fine. One thing, however, is that I live at 5K elevation and the UV at this altitude suggests closing down another half stop. If I put a UV filter in front of the cell, it reads the same as my battery models.

Just one of the peculiarities of the selenium cell although their spectral response is superior to SBC meters and is unaffected by IR.

-Fred