First of all, I want you guys to know that I actually work in the electronics industry as a Class 4 Assembler and as a technician / engineer's helper. There are 3 grades of electronics assembly and components. The 3 grades are: Consumer Spec, Military Spec, and Weapons Spec. Consumer Spec is made to last an average of 4 to 7 years. Military Spec is made to last 7 to 15 years. Weapons Spec is made to last for at least 20 years. Most things produced today are Consumer Spec. Military Spec is a classification of Assembly type and Quality type. It does NOT mean that these parts are made for the military. Actually, Weapons Spec is done for the military. The Amiga Custom Chips that have the black plastic bodies are Consumer Spec ICs. This is what's in most Amiga computers. The Amiga Custom Chips with the purple-pink ceramic bodies with gold-platted legs are Military Spec. These ICs are very high quality and are designed to last at least 15 years. The ceramic bodies dissipate heat better then the black plastic bodies, so the ICs last a lot longer. Also, the gold-platted legs allow the signals to flow more efficiently. The gold-plated legs are also less susceptible to corrosion. The first run of Amiga 1000 and 2000 computers all had Military Spec Custom Chips. Some even had Military Spec DRAM! My first Amiga 1000 sure did. Just last month, a guy on eBay was selling Military Spec 68-pin 68010 processors for $14.99 plus shipping. I bought one for each of my 3 Amiga 2000HDs. These 68010 processors are pin for pin compatible with the normal black-bodied 68000 processor. They just plug in. If you replace the crystal as well, you can actually gain up to 20% increase in speed. :-P