Branson - Gold Ultrasonic Booster - their is no Part #, and it looks to be a Branson Booster, though it is unmarked. A standard Gold Branson Booster is a 1.5:1 Booster.

Buyer to pay for shipping via the USPS Priority Mail, if located in the United States. Elsewhere to be quoted, via the USPS Priority Mail.

Thanks for looking, and hopefully purchasing!! KR