G’Day Craig, not exactly but I have had a few similar Micromatic fonts apart to check the lamp voltage and they can be fiddly.
Rule #1 Dont get rough with it.
You will have to take it off the bar and check for screws etc under the bottom plate etc, I’m guessing you may have to disassemble the tap and pouring neck, this may be screwed in place much care required, then the back plate may have a spigot meaning you may have to lift it gently (or down) to pull if off. Do it slowly, it will come apart with lots of care…
Good luck. ps free advice, no responsibility :-}