NOT AM, BUT TUBE RADIO ERA RELATED,,,,

[K7NCR]

Did Swan ever do this??
http://cgi.ebay.com/vintage-Ham-Radio-Adjust-Scope-Oscilloscope-Crystal_W0QQitemZ350248389834QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item518c6e4cca&_trksid=p3286.c0.m14
If not, someone used a SB-610 to make a Swan style monitor. Kinda like the "Collins" style SB-610 seen on e-pay for mucho $$$
Thought it was interesting...
Norm K7NCR

[Opcom]

well whatever it is, it's certainly worth $9.

Are the top holes slots or round? It is really hard to see. Sure it is AM related..

[K7NCR]

Mesa thinkin' I'll maybe bid if it don't go to high. Who knows, maybe I'll get another swan station someday! 

[Ralph W3GL]

        Round, both front and back!

[W9GT]

It looks like a repackaged and modified Heathkit HO-10 scope.  It, however, has more controls than the HO-10.  There was a guy here locally who made panels for HO-10s  to match Drake and Collins gear.  Painted the cabinets and repaced the panels and knobs and they looked really nice.  You see them around at hamfests occasionally.

There may have been a Swan version also, although this example is not a stock HO-10.  It has some additional controls/features.

73,  Jack, W9GT

[Opcom]

It wouldn't be something like and RTTY converter would it? Alot of knobs for a mod scope. And it looks like it says RTTY on it.