https://www.computinghistory.org.uk/det/49443/Acorn-ACA53-PC-Card-IBM-486-Blue-Lightning-DX2/
Acorn ACA53 PC Card - IBM 486 Blue Lightning DX2 - Peripheral - Computing History
The Acorn ACA53 is a second generation PCcard also known as Gemini II see bottom picture middle top.The Acorn ACA53 is a second generation PCcard also known as...
pc card