Vintage Dynamic Stereo Wired Very Rare HE+ retail Headphones

Product Name: Vintage Dynamic Stereo Wired Very Rare HE+ retail Headphones
very rare HE+ HE-325,vintage stereo headphones.These are wired & have a 6.35 mm jack for your studio & audio monitoring needs.These i couldn't find anything about no where on the net.I assume they're from the early to late 70's but could possibly be from the 60's or 80's.If you find anything on these super rare & cool headcans I'd love to know what you found out about'em.They are in excellent working and cosmetic condition.I included a brand new high quality converter so you can listen to these bad retail boys on any device that has a 3.5mm jack.The sound is very good & very unique w/good balance & soft bass!!!.