The 1952 plates were multi-year, starting with X/A 1000 and going to X/Z 9999.
Once X/Z 9999 was reached, the pattern changed to X/A A100.

The plates below are displayed in the order they were issued.

Highest number known on this base is X/N J428.

Color variation - these plates are in as-found condition and were never repainted.
Whatever environment they were in caused the orange to fade/oxidize to ... green.

Dave Zullo
Still a bit of orange near the bottom left !

Dave Zullo
This one is half green.

In 1957, the plates were re-sized to 6 x 12 inches and the numbering continued from the 1952 base, probably starting at X/O A100.
I will display these in issue order, no matter what year tabs they have.

XF 1881 is a very early remake - a 1952 number remade on the 1957 base.

In late 1959, a few commercial plates were made with the "N. J." on the bottom, with new thinner dies like the upcoming tan 1960 base.
They were also made of aluminum, whereas the earlier plates were steel.
The steel plates with the stacked NJ stopped sometime after X/W C764, and the new aluminum plates started before X/W E841.

Anybody out there have an X/W D series plate ?

The highest number known on this base is X/X N561.

Was this plate really used through 1962 ?

Paul Kovalski