Zinc Ring
Description
A record of casting production for pattern number 6909. No pattern sketch on recto. Inscription on recto reads "3" o.d. x 2" i.d. x 3/4" thick" "Dr. No. 39-23".
A record of casting production for pattern number 6909. No pattern sketch on recto. Inscription on recto reads "3" o.d. x 2" i.d. x 3/4" thick" "Dr. No. 39-23".