Mining a mile below ground and flying a mile above may not seem to have much in common, but there is at least one factor that binds the miner in his pit to the pilot in his aircraft. Both have learnt to depend upon the reliability of Oldham Batteries and both appreciate the fact that Oldham Batteries arebuilt to give maximum efficiency for minimum weight at all material times.

OLDHAM & SON LTD, DENTON - MANCHESTER,br>EST. 1865