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new manufacturers installations collection restorations timeline identification publications glossary mailing list site map links about contact	BTH full range | Low Pressure Sodium Lanterns Sodium Enclosed Lantern SL.721 140W SO BC Top Entry No Gear 1950s book 1953 advert SL.722 85W SO BC Top Entry No Gear 1950s book 1953 advert SL.730 140W SO BC Side Entry No Gear 1950s book 1953 advert SL.731 85W SO BC Side Entry No Gear 1950s book 1953 advert Sodium Open Lantern SL.715 140W SO BC Top Entry No Gear 1950s book SL.716 85W SO BC Top Entry No Gear 1950s book SL.735 140W SO BC Side Entry No Gear 1950s book SL.736 85W SO BC Side Entry No Gear 1950s book Horizontal Sodium Open Lantern ?? 85W SO BC Side/Top Entry No Gear Public Lighting #77 ?? 140W SO BC Side/Top Entry No Gear Public Lighting #77 Amber ?? 85W-140W SO BC Side Entry No Gear 1955 Advert ?? 85W-140W SO BC Side Entry Gear 1955 Advert