Tin whiskers and other packaging problems

[Refugee]

Here are a few more variants on the E-line package.
Top left are BC171A in the classic grey package and 3793 (no data sheet).
Top right is a BC182L and 2N3704 in a very early package.
Bottom right is a 2SK19 also in a very early package.
Bottom right and center are three examples of Japanese E-line clones. 2SA677 in a greed package, 2SC634 in black and 2SC403C in a brown package.
Bottom right are 2SC458 and 2SC673 in a square package with a sloping top to denote the lead outs.