-DEPT of COMMERCE Hazeltine CA-1601 - rare version of tube limiter from 1953 extremely well built for federal use. With Freed and Berkshire transformers. For special use (certain instruments or parallel use) as its frequency is limited at bottom and top, they used it for speech at airports, I guess. Original, not modded condition in a very good working condition. 1,5k EUR +VAT (not applied when you are outside of EU or having EU VAT number)