Buy & SellHilger & Watts SLIO-1 Optical InstrumentHilger & Watts SLIO-1 Optical Instrument$180Selling a Hilger & Watts SLIO-1 optical instrument. It comes with its original case. A cool vintage piece for collectors or enthusiasts!WHERE TO MEETmartindaleView MapSELLERverifiedConorMartindale26624 reviews0 chats·0 favorites·4 views