Boeing W-100 acustic guitar (1971-73)

[titano]

Hello everyone! I found a Boeing W-100 acoustic guitar by Chuan Yin Musical Instruments Co. Ltd. It's the first custom product of the brand, made in Taiwan (probably in 1971), perhaps a Hummingbird copy of the time.

A luthier who saw it claims that it is completely handmade and that it can be very precious. Does anyone know this brand and in particular this custom model W-100 and can you give me an idea of ​​its value on the market?

Thank you very much!