Xphasor - Contact the GWS website with your question.
Their website shows JR crystals to be a direct replacement for GWS crystals on certain receivers and frequencies.
http://www.gws.com.tw/english/produc...on%20chart.htm
If only other manufacturers would give such detailed info'.
Changing component values for different frequencies in todays receiver manufacture is just a matter of pressing a couple of buttons on the assembly machine.
Similar concept applies when you take your photographic film to a high street shop and the prints are ready in 30mins - in different sizes if you want. It's just a transfer of production technology ideas.