Punch Making


A fast and efficient punch manufacturing service

We have pantograph engraving and state-of-the-art laser machines that enable us to offer a fast and efficient punch manufacturing service. We can make flat or curved punches on 'traditional straight' or 'swan neck' shanks in our workshop at Goldsmiths' Hall. You will be required to provide us with the necessary artwork and then we can proceed.

The punches are cut by laser and finished by hand to an exceptional standard and are suitable for hand marking or marking by press. Punches can be made in a range of sizes from 0.5mm, with a nominal upper limit of 6mm.

For more information, please contact us at info@assayofficelondon.co.uk or call 020 7606 8971.

Read more in the article in the Goldsmiths' Review 2011/2012 "Engineering Hallmarks". 

Straight punch stack

  • 1. Engineer aligns design to the punch

    1. Engineer aligns design to the punch

  • 2. Mastertype is used as guide for new punch

    2. Mastertype is used as guide for new punch

  • 3. Engraving the witness (outline) of each mark on new punch

    3. Engraving the witness (outline) of each mark on new punch

  • 4. Engraving the witness (outline) of each mark - detail

    4. Engraving the witness (outline) of each mark - detail

  • 5. Witness lines

    5. Witness lines

  • 6. Engraving of hallmark by pantograph

    6. Engraving of hallmark by pantograph

  • 7. Engraving of each hallmark taking place - detail

    7. Engraving of each hallmark taking place - detail

  • 8. Heat treatment to harden punch

    8. Heat treatment to harden punch

  • 9. Tempering - a process to stress relieve the punch after hardening

    9. Tempering - a process to stress relieve the punch after hardening

  • 10. Stages from top: witness type, engraving stage, final details

    10. Stages from top: witness type, engraving stage, final details

  • 11. Stages from top: finished punch, hardenend punch, blank punch

    11. Stages from top: finished punch, hardenend punch, blank punch

  • 12. Finished hallmarking punches - only the sponsors mark need to be applied in addition to these examples

    12. Finished hallmarking punches - only the sponsors mark need to be applied in addition to these examples