My Yamaha FG-230 lives in a similar case - chipboard shell with a yellow "semi plush" lining. Bought is new in Spring 1971 to carry the 12 string. It still does today but it is getting somewhat loose. The handgrip split years ago and is now secured with a "retired" high E string. One latch has lost a rivet and is therefore loose and pivots some. Alignment is off on another as the top extends slightly beyond body. I do note however, that once it completely fails, the FG seems to fit in the hard case that came with the D150. In any case, (no pun intended ) it has served well for 47 years...... far more than I expected.