I purchased a Hohner acoustic guitar, today. The model number inside is G-04. It’s made in Japan & has a serial number of 10646. I can’t find any information on this guitar. Can anybody share any information? It has what appears to be a mother-of-pearl, vertical Hohner logo on the headstock. It’s a bit of a mystery. I thought at first it might be one of the HG models with a faded H but I took a photo & zoomed in. It definitely says G-04. Any help you can provide will be appreciated.