B-29 Superfortress Inspection and Maintenance Guide TO 00-20A-2-B-29 C-7 This unit has the filter

This unit has the filter for cleaning vacuum air as it is pulled across the gyro to power it

the pointers do not reset

According to the manual

a tall pilot might want to climb his aircraft that is actually in level flight

probably received them wirelessly

B-29 Superfortress Inspection and Maintenance Guide TO 00-20A-2-B-29 C-7 This unit has the filterHere is an Aircraft Inspection and Maintenance Guide for the Boeing B 29 Superfortress bomber of the US Air Force dated 1948. This 8 inch by 5. 5 inch, 80 page manual specified inspection and maintenance frequency and procedures, such as Preflight, Daily, during Engine Change, or elapsed flight hours, for all aircraft systems. It is certainly 'experienced' but that's what makes it special in our opinion. It appears to be complete with no rips or tears.