Hensoldt Diagon 10X50 almost 7 degrees FOV and clean as gin, however the leatherette is brittle and will need replacement. Focus is counterclockwise to infinity.
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Andy,
I can't tell about the condition of the leatherette on the bins but depending, you might try a leather care cleaning product called Bick 4. Works great on all smooth leathers and does not darken the finish. To my surprise I carefully tried it on some older leatherette bins and it cleaned and brightened up the armor. Also very good for conditioning, preserving and softening leather cases and straps. No affiliation.
Mike