Here is a lovely little Menghini Midget 120 bass piano accordion. It has a smaller size keyboard, 15 1/2", perfect for women with smaller hands or children. It has a two reed treble section with the LM reed configuration. It has 4 sets of reeds in the bass. This instrument was made in Italy. I'd put the vintage as 60's.
I have refurbished the instrument myself. I cleaned all the reeds and replaced all reed wax with any leathers that were showing age. I took apart, cleaned, and regulated the treble section action. I also dissembled the bass section action and replaced the pads and attaching wax with new, and adjusted it completely.
I then went over the tuning of the complete instrument and set it to an accordion standard A-442..