If I'm not mistaken this is a L-8 E. Very similar to the L-4 E, but the L-8 has 2.3mm between bottom bar and "D.C."
Here's a blurb on the L-8 from the catalog:
"Vertical distance between bottom of state and inside of lower line = 2.3 mm. New type added since 6th edition originally published, increasing type count by 1."
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