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International Sewing Machine Collectors' Society

The purpose of the International Sewing Machine Collectors' Society is to foster the collecting of, and research into, sewing machines.

Singer Sewing Machine Serial Number Database

Serial Numbers Beginning with: AP
Letter Register Numbers
From - To		 Machine Class
(Model No.)		 Quantity Allotted Date Allotted Year Allotted Notes
AP- 000001 150000 600 150000 October 26 1964
AP- 150001 250000 603 100000 October 26 1964
AP- 250001 295000 604 45000 October 26 1964
AP- 295001 295001 554-504 1 November 10 1964
AP- 295002 295002 555-101 1 November 10 1964
AP- 295003 295003 555-601 1 November 10 1964
AP- 295004 295028 256-5 25 November 10 1964
AP- 295029 300028 251 5000 December 10 1964
AP- 300029 301028 269 1000 January 6 1965
AP- 301029 301228 7 200 January 12 1965
AP- 301229 301728 300 500 January 21 1965
AP- 301729 303728 262 2000 January 27 1965
AP- 303729 304728 261 1000 February 1 1965
AP- 304729 305728 17 1000 February 16 1965
AP- 305729 305753 256 25 February 17 1965
AP- 305754 305754 552-105 1 March 9 1965 PROTOTYPE
AP- 305755 305755 552-203 1 March 9 1965 PROTOTYPE
AP- 305756 305756 554-121 1 March 9 1965 PROTOTYPE
AP- 305757 305757 554-301 1 March 9 1965 PROTOTYPE
AP- 305758 305758 554-504 1 March 9 1965 PROTOTYPE
AP- 305759 305759 554-504 1 March 9 1965 PROTOTYPE
AP- 305760 305760 554-601 1 March 9 1965 PROTOTYPE
AP- 305761 305761 554-606 1 March 9 1965 PROTOTYPE
AP- 305762 305762 555-201 1 March 9 1965 PROTOTYPE
AP- 305763 305763 555-601 1 March 9 1965 PROTOTYPE
AP- 305764 305764 555-601 1 March 9 1965 PROTOTYPE
AP- 305765 310764 281 5000 March 22 1965
AP- 310765 311264 82 500 April 2 1965
AP- 311265 312264 300 1000 April 9 1965
AP- 312265 313264 269 1000 April20 1965
AP- 313265 313764 175 500 April20 1965
AP- 313765 314764 114 1000 April 21 1965
AP- 314765 319764 281 5000 May 4 1965
AP- 319765 320264 147 500 May 21 1965
AP- 320265 320265 552-141 1 June 10 1965 PROTOTYPE
AP- 320266 320266 554-121 1 June 10 1965 PROTOTYPE
AP- 320267 320291 256 25 June 16 1965
AP- 320292 325291 281 5000 June 29 1965
AP- 325292 326291 269 1000 June 30 1965
AP- 326292 331291 281 5000 August 27 1965
AP- 331292 346291 604 15000 August 27 1965 see notation in book
AP- 346292 346791 18 500 September 3 1965
AP- 346792 347291 175 500 September 3 1965
AP- 347292 352291 604 5000 September 30 1965
AP- 352292 392291 600 40000 September 30 1965
AP- 392292 392491 7 200 October 13 1965
AP- 392492 392791 159 300 October 13 1965
AP- 392792 393291 281 500 October 15 1965
AP- 393292 393316 256 25 October 18 1965
AP- 393317 394316 300 1000 November 3 1965
AP- 394317 399316 281 5000 November 5 1965
AP- 399317 400386 269 1070 November 10 1965
AP- 400387 405316 552 4930 December 6 1965
AP- 405317 410316 554 5000 December 6 1965
AP- 410317 415316 555 5000 December 6 1965
AP- 415317 415616 7 300 December 6 1965
AP- 415617 420616 281 5000 December 6 1965
AP- 420617 421616 300W 1000 January 24 1966
AP- 421617 487616 600 66000 January 27 1966
AP- 487617 529616 603 42000 January 27 1966
AP- 529617 549616 604 20000 January 27 1966
AP- 549617 550616 269 1000 January 31 1966
AP- 550617 555616 281 5000 February 2 1966
AP- 555617 560616 281 5000 March 22 1966
AP- 560617 560641 256 25 March 24 1966
AP- 560642 561141 175 500 March 29 1966
AP- 561142 563141 269 2000 March 30 1966
AP- 563142 564000 not assigned 859 1966
AP- 564001 624000 620 60000 April 21 1966
AP- 624001 654000 625 30000 April 21 1966
AP- 654001 704000 628 50000 April 21 1966
AP- 704001 718000 629 14000 April 21 1966
AP- 718001 754000 626 36000 April 21 1966
AP- 754001 755000 460 1000 April 26 1966
AP- 755001 755001 555-602 1 May 16 1966
AP- 755002 760001 281 5000 May 19 1966
AP- 760002 761001 114 1000 May 24 1966
AP- 761002 761251 146 250 May 24 1966
AP- 761252 761252 552-203 1 June 14 1966
AP- 761253 761752 7 500 July 13 1966
AP- 761753 761753 552-601 1 July 13 1966
AP- 761754 763753 269 2000 August 1 1966
AP- 763754 764253 302 500 August 4 1966
AP- 764254 764278 256 25 August 8 1966
AP- 764279 769278 281 5000 August 12 1966
AP- 769279 769778 144W 500 September 1 1966
AP- 769779 770778 300W 1000 September 28 1966
AP- 770779 771278 175 500 October 6 1966
AP- 771279 776278 281 5000 October 10 1966
AP- 776279 781278 269 5000 November 11 1966
AP- 781279 781300 not assigned 22 1966
AP- 781301 811300 620 30000 November 17 1966
AP- 811301 821300 625 10000 November 17 1966
AP- 821301 833000 not assigned 11700 1966
AP- 833001 871300 626 38300 November 17 1966
AP- 871301 886300 609 15000 November 17 1966
AP- 886301 911300 625 25000 November 17 1966
AP- 911301 999999 not assigned 88699 1966

ISMACS is an organization totally independent of all sewing-machine manufacturers, past or present and is not affiliated with any of the companies mentioned in these pages.  Please Note: Do not contact any ISMACS official in an attempt to solicit a valuation - it is not possible other than by hands-on assessment and your request will be ignored.

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