The "Proell" pocket calculator
The "Proell" pocket calculator, with booklet of instructions, contained in linen case 6" x 4"
Details
- Category:
- Mathematics
- Object Number:
- 1951-692
- type:
- ready reckoner
- credit:
- Dr W.L. Hildburgh
The "Proell" pocket calculator, with booklet of instructions, contained in linen case 6" x 4"