Coin Security Devices

[DaveG38]

I've just been reading an older version of 'British Coins Market values' that I own, came across the following paragraph and wondered if anybody can shed some light on what it means. Alternatively, tell me what is so obvious that I'm missing it! The article I am quoting from is about the Royal Mint and the minting process.

'A high-energy burnishing machine was also installed to improve the quality of blanks, as was equipment that implants security devices in coins.'

What security devices? Are they all chipped??

For dating purposes the article is talking about new equipment installed in the late 1990s.

[Gary D]

I've just been reading an older version of 'British Coins Market values' that I own, came across the following paragraph and wondered if anybody can shed some light on what it means. Alternatively, tell me what is so obvious that I'm missing it! The article I am quoting from is about the Royal Mint and the minting process.

'A high-energy burnishing machine was also installed to improve the quality of blanks, as was equipment that implants security devices in coins.'

What security devices? Are they all chipped??

For dating purposes the article is talking about new equipment installed in the late 1990s.

I seem to remember something about the introduction of the new £1 coin was supposed to include a hologram to prevent forgeries. Obviously it didn't happen, the hologram bit that is.

Gary