1964 IBM System 360 Mainframe Computer Chip - Solid Logic Technology SLT

[1944GPW]

My late father was a specialist on the System/360 Model 40 during the mid to late 60s. As a kid I remember him bringing home dead Mod 40 circuit boards with lots of SLT modules on them. I had great fun lifting off the metal caps and looking at the tiny transistors there. The top of the SLT substrate had a layer of slippery clear grease on it which used to get on my fingers - I don't know what it was, but I guess silicone grease. Great memories!