Allcocks AERIAL 5138-T1 (1912-1925) 4" Excellent in Original Clam Shell Case

Aerial 5138 -T1, 4", 1912-25. In fantastic, really excellent condition with Allcocks original tan calf leather, blue velvet lined, sprung 'clam shell' case which is in excellent condition. Front ebonite flange unmarked and stamped 'patent', rear ebonite flange as new, back plate stamped with Allcocks 'roundel' and retaining most of original leaded finish, inside backplate as new and retaining 100 % of original leading and stamped 21562, knurled brass check button operating copper caliper 'see through' check, scarce ivorine handles (unmarked), aluminium and brass Bickerdyke line guard, unmarked brass foot stamped '28'.  In first class working order and an astonishing find in this condition.