Date on water meter cover?

[oddcoins]

Hello! I dug this NEPTUNE METER CO. brass meter cover downtown Eugene Oregon a few days ago . . . . I cleaned it up a little . . . on the bottom it's stamped "S-1-44".

Anyone know how to date these things?!

 

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[generic username]

I like it!

id guess Sept 1 1944

 

[taz42o]

1940
6 million Trident meters
shipped since 1892

So with a 5 mill serial number its earlier than 1940.

 

[oddcoins]

WOW ~ that is good to know! THANKS!!