6.3 Youngest Rules
The 25 youngest rules in the collection are presented below. For items in this list for which only a date range or educated guess (circa) is known, the earliest year is used.
| Maker | Model | Year | Type | Mat | L0 | Lx | |
|---|---|---|---|---|---|---|---|
| Pickett | X-3 |
|
1975 | L | Al | 10 | 10 |
| Relay-Ricoh | 151 |
|
1974 | L | bb | 10 | 10 |
| C-Thru | S-96 |
|
1973 | C | pl | 15 | 6 |
| Pickett | N902-ES | 1973 | L | Al | 10 | 10 | |
| Aristo | 867U | 1972 | L | pl | 5 | 5 | |
| Dietzgen | 1776 | 1972 | L | pl | 5 | 5 | |
| Faber-Castell | 52/82 | 1972 | L | pl | 10 | 10 | |
| Faber-Castell | 62/83 | 1972 | L | pl | 5 | 5 | |
| Hemmi | 258 | 1972 | L | bb | 10 | 10 | |
| Relay-Ricoh | 150 | 1972 | L | bb | 10 | 10 | |
| Sterling | 587 | 1972 | L | pl | 5 | 5 | |
| Sterling | 694 | 1972 | L | pl | 10 | 10 | |
| Sterling | 694 | 1972 | L | pl | 10 | 10 | |
| Hemmi | 258 | 1971 | L | bb | 10 | 10 | |
| Hemmi | Pocket Versalog II | 1971 | L | bb | 5 | 5 | |
| Reiss | 3223 Progress | 1971 | L | Al | 10 | 10 | |
| Blundell Rules Limited | 506 Academy Duplex | 1970-1980 | L | pl | 10 | 10 | |
| Dietzgen | 1771 | 1970-1972 | L | pl | 5 | 5 | |
| Aristo | 958 | 1970 | L | pl | 10 | 10 | |
| Boots Ringplan | Precision Log Log |
|
1970 | L | pl | 5 | 5 |
| C-Thru | PS-79 |
|
1970 | C | pl | 16 | 6 |
| Concise | 28 |
|
1970 | C | pl | 8 | 4 |
| Faber-Castell | 2/83N | 1970 | L | pl | 10 | 10 | |
| Fearns Calculators | A13 |
|
1970 | C | pl | 12 | 5 |
| K&E | 68-1892 |
|
1970 | L | pl | 10 | 10 |