| Letter | Register Numbers From - To |
Machine Class (Model No.) |
Quantity Allotted | Date Allotted | Year Allotted | Notes | |
|---|---|---|---|---|---|---|---|
| ES- | 000001 | 060000 | 15K80-82 | 4243 | October 12 | 1960 | |
| ES- | 004244 | 104243 | 15K110-191K | 100000 | October 12 | 1960 | |
| ES- | 104244 | 134243 | 128K | 30000 | October 12 | 1960 | |
| ES- | 134244 | 134343 | 132K | 100 | October 12 | 1960 | |
| ES- | 134344 | 134843 | 133K | 500 | October 12 | 1960 | |
| ES- | 134844 | 139843 | 196K | 5000 | October 12 | 1960 | |
| ES- | 139844 | 140843 | 195K | 1000 | October 12 | 1960 | |
| ES- | 140844 | 142843 | 246K | 2000 | October 12 | 1960 | |
| ES- | 142844 | 152843 | 319K-306K | 10000 | October 12 | 1960 | |
| ES- | 152844 | 157843 | 331K | 5000 | October 12 | 1960 | |
| ES- | 157844 | 162843 | 451K125 | 5000 | October 12 | 1960 | |
| ES- | 162844 | 164843 | 29K | 2000 | October 18 | 1960 | |
| ES- | 164844 | 165343 | 451K31 | 500 | October 18 | 1960 | |
| ES- | 165344 | 167843 | 222K | 2500 | October 19 | 1960 | |
| ES- | 167844 | 168043 | 451K31 | 200 | October 28 | 1960 | |
| ES- | 168044 | 170543 | 320K | 2500 | October 28 | 1960 | |
| ES- | 170544 | 175543 | 221K | 5000 | November 3 | 1960 | |
| ES- | 175544 | 177543 | 29K | 2000 | November 24 | 1960 | |
| ES- | 177544 | 177743 | 45K | 200 | November 24 | 1960 | |
| ES- | 177744 | 227743 | 99K | 50000 | November 24 | 1960 | |
| ES- | 227744 | 229743 | 195K | 2000 | November 24 | 1960 | |
| ES- | 229744 | 234743 | 196K | 5000 | November 24 | 1960 | |
| ES- | 234744 | 235243 | 451K31 | 500 | November 24 | 1960 | |
| ES- | 235244 | 235743 | 133K | 500 | November 29 | 1960 | |
| ES- | 235744 | 367121 | 201K | 3000 | November 29 | 1960 | |
| ES- | 238744 | 239243 | 45K | 500 | January 10 | 1961 | |
| ES- | 239244 | 249243 | 221K | 10000 | January 10 | 1961 | |
| ES- | 249244 | 252243 | 15K80 | 3000 | January 16 | 1961 | |
| ES- | 252244 | 272243 | 128K | 20000 | January 16 | 1961 | |
| ES- | 272244 | 282243 | 320K | 10000 | January 16 | 1961 | |
| ES- | 282244 | 302243 | 328K | 20000 | January 16 | 1961 | |
| ES- | 302244 | 302343 | 138K | 100 | January 27 | 1961 | |
| ES- | 302344 | 342343 | 328K | 40000 | January 27 | 1961 | |
| ES- | 342344 | 352343 | 15K80-82 | 10000 | January 27 | 1961 | |
| ES- | 352344 | 357343 | 222K | 5000 | January 31 | 1961 | |
| ES- | 357344 | 360343 | 188K | 3000 | January 31 | 1961 | |
| ES- | 360344 | 361843 | 29K | 1500 | February 6 | 1961 | |
| ES- | 361844 | 364843 | 188K | 3000 | February 6 | 1961 | |
| ES- | 364844 | 414843 | 306K-319K | 50000 | February 6 | 1961 | |
| ES- | 414844 | 417843 | 246K | 3000 | February 6 | 1961 | |
| ES- | 417844 | 419843 | 29K | 2000 | February 17 | 1961 | |
| ES- | 419844 | 419943 | 46K | 100 | February 17 | 1961 | |
| ES- | 419944 | 424943 | 188K | 5000 | February 17 | 1961 | |
| ES- | 424944 | 434943 | 201K | 10000 | February 17 | 1961 | |
| ES- | 434944 | 437443 | 328K | 2500 | February 17 | 1961 | |
| ES- | 437444 | 487443 | 99K | 50000 | march 1 | 1961 | |
| ES- | 487444 | 517443 | 128K | 30000 | march 1 | 1961 | |
| ES- | 517444 | 517943 | 132K | 500 | March 10 | 1961 | |
| ES- | 517944 | 522943 | 188K | 5000 | March 10 | 1961 | |
| ES- | 522944 | 527943 | 222K | 5000 | March 30 | 1961 | |
| ES- | 527944 | 528443 | 451K | 500 | April 28 | 1961 | |
| ES- | 528444 | 528543 | 138K | 100 | April 28 | 1961 | |
| ES- | 528544 | 530543 | 15K80-82 | 2000 | May 2 | 1961 | |
| ES- | 530544 | 580543 | 15K110-191K | 50000 | May 2 | 1961 | |
| ES- | 580544 | 580743 | 45K | 200 | May 2 | 1961 | |
| ES- | 580744 | 580843 | 91K | 100 | May 2 | 1961 | |
| ES- | 580844 | 600843 | 128K | 20000 | May 2 | 1961 | |
| ES- | 600844 | 601043 | 133K | 200 | May 2 | 1961 | |
| ES- | 601044 | 601143 | 172K | 100 | May 2 | 1961 | |
| ES- | 601144 | 601643 | 196K | 500 | May 2 | 1961 | |
| ES- | 601644 | 606643 | 306K-319K | 5000 | May 2 | 1961 | |
| ES- | 606644 | 646643 | 328K | 40000 | May 2 | 1961 | |
| ES- | 646644 | 647143 | 246K | 500 | May 2 | 1961 | |
| ES- | 647144 | 648143 | 451K | 1000 | May 2 | 1961 | |
| ES- | 648144 | 658143 | 221K | 10000 | May 15 | 1961 | |
| ES- | 658144 | 658443 | 45K | 300 | May 31 | 1961 | |
| ES- | 658444 | 660443 | 15K80 | 2000 | May 31 | 1961 | |
| ES- | 660444 | 661443 | 451K | 1000 | May 31 | 1961 | |
| ES- | 661444 | 691443 | 128K | 30000 | May 31 | 1961 | |
| ES- | 691444 | 741443 | 99K | 50000 | May 31 | 1961 | |
| ES- | 741444 | 742943 | 29K | 1500 | May 31 | 1961 | |
| ES- | 742944 | 743943 | 246K | 1000 | June 6 | 1961 | |
| ES- | 743944 | 753943 | 15K80 | 10000 | june 15 | 1961 | |
| ES- | 753944 | 756943 | 246K | 3000 | June 15 | 1961 | |
| ES- | 756944 | 766943 | 15K80-82 | 10000 | June 19 | 1961 | |
| ES- | 766944 | 767243 | 45K | 300 | July 19 | 1961 | |
| ES- | 767244 | 768243 | 246K | 1000 | July 19 | 1961 | |
| ES- | 768244 | 818243 | 328K | 50000 | July 19 | 1961 | |
| ES- | 818244 | 868243 | 15K110 | 50000 | August 8 | 1961 | |
| ES- | 868244 | 868743 | 196K | 500 | August 8 | 1961 | |
| ES- | 868744 | 873743 | 451K | 5000 | August 8 | 1961 | |
| ES- | 873744 | 883743 | 221K | 10000 | August 19 | 1961 | |
| ES- | 883744 | 888743 | 196K | 5000 | August 21 | 1961 | |
| ES- | 888744 | 893743 | 331K | 5000 | August 25 | 1961 | |
| ES- | 893744 | 894743 | 15K80 | 1000 | September 13 | 1961 | |
| ES- | 894744 | 895243 | 45K | 500 | September 13 | 1961 | |
| ES- | 895244 | 898243 | 196K | 3000 | September 13 | 1961 | |
| ES- | 898244 | 948243 | 328K | 50000 | September 13 | 1961 | |
| ES- | 948244 | 956243 | 331K | 8000 | September 13 | 1961 | |
| ES- | 956244 | 961243 | 451K | 5000 | September 13 | 1961 | |
| ES- | 961244 | 999999 | 99K | 38756 | October 16 | 1961 | |