Vincent Audio Hybrid SV...?

Not too long ago I bought a used Vincent Audio SV 236mk. I've been browsing various forums looking for others experiences with the amp, as well as tube rolling mine, and have found out something rather strange. I found a picture of someone's amp they took and posted. What I have labeled A B C all are marked as SV236MK, as to be expected. However, in my amp (which according to the information on the rear panel & the box it came in is a SV 236MK) those same three boards are marked as SV 237MK!? Unfortunately the amp is at work or I would take pics of its innards, but I know the marking say SV 237MK and the smaller board marked C here is a completely different layout, and even A&B have differences. . It does use 12AX7 in all three tube positions, unlike an actual 237MK. Any idea what is going on?