Liquid filled bar sign
Hi! I picked up this grail of a sign yesterday at a flea market and she obviously needs a little love. Does anyone have any information on this piece that could help with restoration. I haven't been able to find any info online. Here are some details about the sign:
-It's just under half filled with a black liquid, I'm guessing some sort of glycerin dyed black. The housing does leak a little, should be easily fixed with some silicone or a new gasket (I'm not sure what's in the inside yet). Does anyone know where this sign should be filled to, half, 3/4, I doubt full?
-On the back there are two knobs that adjust airflow and two power switches. One turns on the pump that moves and aerates the liquid, the other switch does nothing that I tell. Possibly a light?
-when turned on, the liquid in the face of the sign is aerated and a foam 'head" is created. After about a minute or so the liquid in the face drains out (pumped to the back), then the sign refills again.
-on top of the sign is a little knob that can be rotated and pulled out but not completely removed. I'm guessing that this is either a vent for the glycerin (I work with a lot of pressure gauges, filled ones usually have a little vent on top), or possibly a way to empty out the liquid.
- the back of the housing is screwed to the front with a number of screws. There are no info stickers on the housing, she has definitely spent some time in a garage lol.
I only paid $25 for this so I'm thinking about just sending it and popping off the back to see what's going on in there. But I appreciate if anyone has any info on this sign or if they have seen it out in the wild info on how it's supposed to look/run.
Thanksss