Guidance

Weights and measures: national stamp numbers

Listings of numbers for identifying items of weighing or measuring equipment.

• From: Office for Product Safety and Standards
• Published: 19 September 2016
• Last updated: 8 October 2026
  Show all updates

  1. 8 October 2026

     Stamp list Updated

  2. 1 October 2026

     Stamp List Updated

  3. 17 June 2026

     Stamp Numbers Updated.

  4. 10 June 2026

     Stamp List Updated

  5. 15 January 2026

     Stamp Number List Updated.

  6. 8 December 2025

     Stamp Number List Updated.

  7. 25 November 2025

     Stamp Number List Updated.

  8. 7 October 2025

     Stamp Number List Updated.

  9. 24 September 2025

     Stamp Number List Updated.

  10. 20 May 2025

      List Updated

  11. 16 May 2025

      UK List Updated

  12. 11 April 2025

      Stamp Numbers Amended

  13. 9 April 2025

      Stamp Number List Updated

  14. 7 March 2025

      List of authorised stamp numbers updated.

  15. 25 February 2025

      List of authorised stamp numbers updated.

  16. 24 July 2024

      List of authorised stamp numbers updated.

  17. 2 May 2024

      List of authorised stamp numbers updated.

  18. 22 February 2024

      List of authorised stamp numbers updated.

  19. 29 January 2024

      List of authorised stamp numbers updated.

  20. 6 November 2023

      List of authorised stamp numbers updated.

  21. 19 October 2023

      List of authorised stamp numbers updated.

  22. 3 October 2023

      List of authorised stamp numbers updated.

  23. 30 August 2023

      List of authorised stamp numbers updated.

  24. 20 March 2023

      List of authorised stamp numbers updated.

  25. 5 October 2022

      List of authorised stamp numbers updated.

  26. 3 December 2021

      List of authorised stamp numbers updated.

  27. 25 August 2021

      List of authorised stamp numbers updated.

  28. 26 July 2021

      List of authorised stamp numbers updated.

  29. 26 May 2021

      List of authorised stamp numbers updated.

  30. 2 December 2020

      List of authorised stamp numbers updated.

  31. 5 April 2018

      Listings of numbers for identifying items of weighing or measuring equipment has been updated.

  32. 19 September 2016

      First published.

Documents

Authorised Stamp Numbers for use by Local Weights and Measures Authorities and Approved Verifiers – June 2026

HTML

Details

This document lists the numbers allocated to Local Weights and Measures Authorities and approved verifiers for identification purposes on items of weighing or measuring equipment. The list covers those numbers used to indicate equipment which has been passed fit for use for trade in accordance with the Weights and Measures Act 1985.