Stock Book, Volume 3. 1866-1871
Brent Archive 198028/5/3
Serial numbers 11000-19000
Triple Achromatic Settings, Sliding.
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.................................................................................................. No.1 6x5
................................................................................................... No.2 81/2x61/2
................................................................................................... No.3 10x8
................................................................................................... No.4 12x10
................................................................................................... No.5 15x12
................................................................................................... No.6 18x16
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