Early LE-10A and JBL 10 questions

[Bigsbyguy]

Here's a couple shots of the earliest LE-10A I've seen so far. I buy them when they're affordable, usually they're much less expensive than the D-110F's, and recone them for instrument use. Can anyone shed some light on this speaker?
761687616976170
I'm in the market for reconing parts. I'm guessing the D-110F parts would be my choice?
My next question to ask this crowd is, are these the earliest 10" JBL's? I've seen 50's 15's, 12's and 8's but was there a 10 in the 50's?

[BMWCCA]

The LE10A is shown in this brochure in the library estimated to be from 1960:

http://www.lansingheritage.org/images/jbl/specs/home-comp/le-bass/page1.jpg

And the LE10A as shown in this '62 brochure, also from the LH library. I didn't see any earlier than these:
http://www.lansingheritage.org/images/jbl/catalogs/1962/page10-11.jpg

[Bigsbyguy]

Thanks for that info. All the other LE10's I've seen have been black and the vent hole is covered with screen.