I purchased Wheatstone #54769 (30 key C/G Anglo) about 3 years ago. I took it in for repair recently and the technician didn't recognize the inside of it. I queried the seller and they said it had undergone the "South Africa treatment" before they got it. I know this has been an occasional topic of conversation on these forums (https://www.concertina.net/forums/index.php?/topic/5043-opinions-on-this-wheatstone-anglo/), and I've found some other discussions as well - http://www.concertina.com/gas