PLANTAGENET. Edward I. 1272-1307. AR Penny (18mm, 1.49 g, 11h). In the name and types of Henry III. Long Cross type, class VI. Bury St. Edmunds mint; Ion, (John de Burnedisse) moneyer. Struck 1272-1278. Crowned facing bust; scepter to left / Voided long cross; trefoils in quarters. North 1001; SCBC 1377 From the Ridgegate Collection. Purchased from P. Minns, April 1971. Ex Colchester Hoard, 1969. for more info regarding the Colchester Hoards, please refer to this URL https://www.yorkcoins.com/colchester_hoards_of_voided_long_cross_pennies.htm
During late July 2017, I visited the Tower of London and came across the following display in the "Mint" which has a very interesting history of the Tower Mint on display with numerous examples of coins minted there from Medieval times towards the early 18th Century. The exhibit is found of course on "Mint Street". The display discussed the Colchester Hoard:
The actual lead canister had a height of 235 mm.
Photo of coins on display from the Colchester Hoard
A book I obtained during a visit to the British Museum by Eleanor Ghey, Hoards; Hidden History published by the British Museum Press in 2015 discusses the Colchester Hoard on pp. 101-103. The 1969 hoard consisted of 14,065 coins and was made up of two batches dated 1256 and then 1268-78. Of interest regarding the coin illustrated above from Bury St. Edmunds, is noted "The latest batch was a small 'top-up' of about 2,000 freshly struck coins from the nearest local medieval mint at Bury St. Edmunds, which had been placed in the top of the container. This indicates several episodes of hoarding by the same individual(s) rather than a one-off event. The lead canister is likely to have been made especially for this purpose. It was almost full, but had it been so it would have just accommodated a volume of coins up to the value of 100 marks (a commonly used unit of account for larger sums). The amount of money involved equates to tens of thousands of pounds in modern terms and it is likely that it was held by someone involved in sizeable financial transactions as part of their business dealings, such as a merchant or a banker." (pp. 102-3).