Rare Mica Capacitor 1μF (2 pcs) and SM Capacitor 0.1μF (2 pcs) Set

Set of 2 each of 1μF mica capacitors and 0.1μF SM capacitors (SM likely refers to Silver Mica).
These were used as references in two NTT (Nippon Telegraph and Telephone Public Corporation) specification Ando Electric impedance bridges acquired over 30 years ago. In recent years, I have switched to using a digital LCR meter, and when I disassembled the bridges because their large size was inconvenient, I kept these with the intention of using them as coupling capacitors for a vacuum tube stereo preamplifier. However, I no longer have the energy to build it, so I am listing them as part of my end-of-life preparations.
The LCR meter shown in the photo was used to confirm the capacitance and is not part of the product. These have low capacitance error and very low loss, and I believe it is difficult to obtain them in sets of two like this.
As shown in the photo, I will include a bakelite insulation base as a bonus, but it will be removed for shipping convenience.
When used as coupling capacitors in a vacuum tube amplifier, the insulation base allows the case to be insulated from the chassis, reducing stray capacitance.
Shipping will be via Takkyubin Compact or Yu-Pack.
These are old items and are being sold as junk. Please purchase with the understanding that returns will not be accepted even if there are issues with the product upon arrival.