JVC VL8 Tonearm weight

I have a vintage JVC VL8, that my dad owned since new, and he gifted it to me.  I have it running an AT ART9, and it sounds fantastic.  But, I have often wondered if the ART9 is a good match.  I've searched high and low, but cannot find the weight of the tonearm.  It is an S-shaped arm, and is aluminum or some type of alloy.  I don't want to take it apart just to weigh it, but I'm curious.  

Does anyone know the effective weight of this tonearm?