From November 2021 until the end of 2022, an additional mark is available to mark Queen Elizabeth II’s Platinum Jubilee – 70 years on the throne.
Here is an ingot with the 2021 marks and a close up of the additional mark. For some reason the date letter is not available in 2021 with the Platinum Jubilee mark, but the arrangement shown below identifies the assay date to November or December 2021. That’s the most precise dating in my collection started in 1979. More detail.
