P-133: Parker 51 Aerometric
P-146: Parker 51 vac
P-156: Parker 51 vac filler demonstrator
P-159: Parker 51 aerometric
P-161: Parker 51 aerometric
P-91: Parker 51 demi, vac fill
Parker 51 demi. Cedar blue vac filler (c 1947) - ExF.Parker 51 demi . Cedar blue vac filler. Cap with Gold filled converging vertical lines. Nib: fine, firm, smooth writing. Measures: 5- 1/8". Condition: ExF. 1947 was the last year of the demi vac filler.