New Samsung KM4164B Dynamic RAM ICs.
If you need to replace the RAM in your Commodore 64, then these will work great!
These are also used in the Commodore 128, Apple IIe, Oric Atmos, Sinclair ZX Spectrum, Pravetz 8, IBM PC/XT and IBM PC clones computers and memory cards, and other vintage computers.
Type: 64k x 1bit (65,536 x 1 bit) Dynamic RAM - Plastic DIP16
Working temperature: -10C to +70C
Maximum access time: 150 ns