KVG (Spectrum International) 9 MHz crystal filter
I have both the XF-9A for SSB TX and XF-9B for SSB RX plus matching crystals and sockets and spec sheet. These were made in Germany. The TX is unused and the RX is like new. If you purchase both the price is $100 total + shipping. I can also supply crystals to heterodyne 10-15-20-40-80 m to a 9 MHz IF using a 5-5.5 MHz VFO. And, if you are building a receiver, I can provide 9 MHz IF transformers to match.
Update: As of Feb. 17th, the RX filter and crystals have been sold and I have only the XF-9A for TX left.