Compression Tester with Pressure Gauge

*Price has been changed.

Compression tester set with pressure gauge and adapters.

- Pressure Gauge: Compression tester with pressure gauge
- Hose Length: Approximately 30cm hose
- Accessories: 3 types of adapters
- Manual: Comes with a compression specification manual

Thank you for looking.

*Price has been changed.

● Purchased locally approximately 40+ years ago.
● I was debating whether to dispose of or keep this tool from my storage toolbox, but decided to list it in case someone could use it. (Perhaps it can be considered a toy? It was usable then and is still usable now... please see photos.)
● The gauge has kg/cm2 on the outer scale and psi on the inner scale. (The scale is quite large.)
● I have forgotten the manufacturer. (I can confirm it is USA-made...) It was purchased from a Snap-on Van sale (which I believe is the same as the current Japan System; they used to order not only Snap-on but also other items upon request).
● Looking at the manual again, it features many American cars from the 1960s. *This is for gasoline engines only, of course.
● For reference, I tested the compression pressure of a certain domestic car (4-cylinder) (please see photos). It was measurable, but... (I believe the approximate compression for domestic cars is around 12-14 kg/cm2...). *This is a tester from about half a century ago! Is it an antique?
● The spark plug thread sizes are approximately 17mm for the large one and 14mm for the small one. (Attachments)
● I just remembered, I feel like American cars often have tapered spark plug seats. (This may not be helpful!?)
● Please use it if you like. If the size fits, it might work for motorcycles too? (Please judge from the photos.)
● I am currently decluttering (Marie Kondo-ing).
*The listing is for the tester and attachments only. Measuring tape and other items are not included.