Pinion to turn Ventelator
Description
A record of casting production for pattern number 10558. No pattern sketch on recto. Inscription on recto reads "Dr. No. 73-28" "goes with # 10557".
A record of casting production for pattern number 10558. No pattern sketch on recto. Inscription on recto reads "Dr. No. 73-28" "goes with # 10557".