AC Unit Help with age

Can not seem to find this unit in my list.

Top of the unit had the name Ingel
plate said Singer

Model # ACR50029-15
Serial # 0114000-H18-0003


Thanks for assistance

They dropped the name in 1984 if that helps

I would say it has past it life span for sure lol

Found that out with the internet search.

I forgot what year the home was build, my next step is to look that up on the appraiser website.

Im going to call it an original install and that it is past its expected life as you said.

Mfg between 1976 and 1978.