The 18 mm and 30 mm were the two oculars packedwith the complete line of Criterion and Bausch & LombSchmidt/Cass Telescopes. Bonus: a copy of the 1986 Dealer Price List for All Telescopes and Accessories !
B&L Criterion ceased operations here in Connecticut November of '87 - We purchased all the remaining Telescopes and Accessories at that time -This is one of those items - a 12.7 mm is also posted(third picture, ocular, on front cover of the 1986 catalog
Just another one of Hundreds of Unique AstroItems from an Inventory extending over 40 Yearsastroptx.com
Filed under: Eyepieces & Accessories