This is an old Bausch & Lomb microscope, useful for examination of textiles, stamps, coins, documents, etc. It includes a fitted wood carrying box (6.5 x 5 x 6.5"), two interchangeable lenses (7x & 19 mm), and 2 attachable stage extenders. The lenses are not on a barrel (as in traditional microscopes) but fit in a loop at the top. Can anyone date it? Give it the appropriate name? Recommend buyers?