Andersok
Posted September 17, 2022 - 9:06pm
Another consideration is the Pelham. Same model number 31733. This model shows up in the 53/55/58 pricelists. Here is a 57 linebook image.

There is a SUC crystal that has the bevel and curve in the center that matches the case profile.

Hard to tell the difference between Sky King and Pelham. Maybe the Sky King does not have a beveled crystal.