Identifying Upper and Lower Manuals

[LyonsT]

Hello Forum,

I have been away from restoring for a very long time just started again on a project I have had in bits a M100, starting with a cabinet restoration which has gone nicely. I have been away for such a long time seems I have forgotten everything I once knew and I stupidly didnt make any identifying marks on the manuals to tell me which is which visually. They are stripped down about as far as you can go putting the end blocks and key plates back on. The service manual states they are tapered differently so I really dont want to get them the wrong way around

Would someone with a little more wisdom be able to enlighten me with a method of identification?

One has a hook on the bottom to hold the wiring loom that may help identify tried to find pictures online to no avail.

Thank you, its good to be back :)

[Drawbar Dave]

It’s a long time since i restored an M100 and I can’t remember much about the manuals, but won’t one of them have clips to hold the long metal cover over the switches? The grey metal box, not the black part which fits to the cabinet IIRC.

[theseacowexists]

I thought that the metal topside of the upper manual extends under where the drawbars would be, so if one of your manuals has an excess of metal at the bass end of the keys, wouldn't that be your upper? I think the upper manual should also have one more busbar (and thus an extra row of key contacts) than the lower.

[enor]

I thought that the metal topside of the upper manual extends under where the drawbars would be, so if one of your manuals has an excess of metal at the bass end of the keys, wouldn't that be your upper? I think the upper manual should also have one more busbar (and thus an extra row of key contacts) than the lower.

Actually, both manuals have 9 busbars in the M-100 - but the lower has two of them wired together on a common drawbar.