The US made 9400 Locktites came in a bewildering number of minor variations. I think the Faber people had nothing better to do than retool their factories every other week. The earliest model, shown above, had a smooth nosepiece.

The example above from the early to mid-1950s is distinguished from the earlier style by a knurled nosepiece.

This mid-1950s example differs from the one above (discounting the lead degree indication) by the color coded plastic pushbutton and imprint.

Table of A.W. Faber (USA) Degree Codes/Pushbutton Colors

7B 6B 5B 4B 3B

brass brass brass brass brass

2B B HB F H

maroon white silver pink black

2H 3H 4H 5H 6H

green red yellow blue orange

7H 8H 9H

brass brass brass

The variety of examples on this page is probably not exhaustive. Nearly every time I get a 9400, it differs in some way from the others I have. Compound these variations with the eight or more unique lead degree imprints and you could spend a lifetime just searching for varieties of this one model.