Simple "LS3/5A crossover

I think it will lack bafflestep... 1.5mH and 5uF (or 4.7uF) might be closer.

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The Early Cresta and Coda looked like this:

288715d1340453072-t27-tweeter-replacement-kef-cresta-1968-a-kef_cresta-jpg


The Cresta had a very simple (guesses, 0.8mH?) bass coil, 4uF (3.9uF) and probably about 0.25mH tweeter coil. Probably positive polarity..

290745d1341823798-t27-tweeter-replacement-kef-cresta-1968-a-kef_cresta_early_crossover_4ufcap-jpg
 
I spent a bit more time on this, and my rusty memory refreshed...issue being you have the early B110 SP1003. :)

The First two pictures show a KEF DN13 SP1017 crossover that might work for you. The coil in the notch has a resistance of 6.4R, which you could adjust by adding resistance to another type of coil.
https://www.diyaudio.com/forums/multi-way/262760-build-ls3-5a-speaker-based-t27s-b110s-7.html#post4124901

449077d1416232547-build-ls3-5a-speaker-based-t27s-b110s-kef-dn13-sp1017-b110-t27-6-4r-coil-jpg


449078d1416232547-build-ls3-5a-speaker-based-t27s-b110s-kef-dn13-tweeter-filter-t27-jpg


More detail in this PDF:
http://nedlab.com/wp/wp-content/uploads/2014/06/KEF_Drivers.pdf

The DN13 SP1035 had a 5uF tweeter capacitor and a tweeter coil probably around 0.2mH.
Larger bass coil, maybe 1 to 1.2mH and a definite 6uF. Positive polarity.
Re-building a pair of KEF Codas | pink fish media

You seem to have a few options!
 
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