Strange VOM Issue

My "collection" missing ONE

Top one is a 10 I bought cheap for in a vehicle, it does does not measure current

Far left is a 79, only one I've bought new In the mid 90's it was over 300 bucks

Next one is a 77 I bought used of egag, I've forgotten, 50 bucks?

Next 2 are model 73 III, there is one missing. Bought them of C/L from an old guy S of me and talked him into shipping them. They are VERY dirty outside, fine inside the cases. Used in ?? dirty invironment of some kind. There is one more "someplace" One of they stays in the boat toolbox. I paid something like 20-25 bucks each for them

Last one at far right is a model MD78 sold through MATCO tools. It is specialized automotive, can measure sensor pulses, duty cycle, and tach function and so on, on top of doing most "normal" multimeter measurements. I've forgotten, I paid 80-100 for this used, they are (were) an expensive meter. The "MD" indicates the "MATCO" thing

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