[wave solder]

Here is part of my little collection:-

Avo 40 MKII No.25078-B-564
Avo 8 MkIII No.48562-466
My Avo 9IV has no serial No. on the scale just a number on the case:- 55008 94-9-71
Avo 8 MkII No.139378-C-562

I have more, will add them to the list as I find them.