It's also very easy to tell which PLL is in there when you pull off the lid.
The uPD858 (NEC) is physically larger and has 24 pins.
The MB8719 (Fujitsu) is smaller, slimmer and has 18 pins.
Not to mention the fact they are typically marked on the top, magically revealing type of chip.
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Buttfuzz in the Mobile
SuperStar Gr, KLV203, Wilson5K, 575-M6
Buttfuzz at the Base
Galaxy Class StarShip, A99wGPK, D104-M6B
Buttfuzz Built Deuce and a Quarter</p>