yea right wrote:

SNIPPED

It says filter. Here is a much better picture..

http://www.vambo.org/tmp/Hallicraftt...stalFilter.jpg


Yep! It is a single 455 KHz crystal in a standard FT-243 [if I recall correctly]
size case.

This type "filter" is very common in radios well into the 60s. It is used in
it's series resonant mode in the first 455 KHz i.f. amplifier tuned circuit. The
technique did a fairly good job of sharpening the selectivity of the older
moderately priced AM type receivers.