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new manufacturers installations collection restorations timeline identification publications glossary mailing list site map links about contact	Metrovick full range | Low Pressure Sodium Lanterns Poplar ??? 45-140W SO/H BC Top Entry No Gear 1951 book SO-50 ??? 85-140W SO/H BC Side Entry No Gear 1951 book 1953 advert 1953 advert 1953 advert 1955 advert SO-52 ??? ??? SO/H BC Side Entry No Gear 1953 advert 1953 advert 1953 advert