I've raced for over 30 years with LD19 and LD20 calipers. Now I'm restoring my Titan Mk5 and it has 14LF on the front and something similar, but smaller on the rear.
The 14LF Mk III's are clearly marked and have four bridge bolts, two 3/8 and two 5/16.
The rear calipers have THREE bridge bolts, two 3/8 and one 5/16. The rears are also slightly smaller, but they all, front 14LF's and rear ???'s use a 1.89 piston and seem to take the same size pad. With a 1.89 dia piston, they aren't SP12's, are they?
I need to buy crossover seals once I get them re-plated and I think I can just use 14LF cross over seals. Right?
14LF on right, unknown on left.
Notice upper caliper half is slightly smaller than the 14LF (below)