Line Matching Transformer 600Ω to 8Ω MAX LEVEL 3WAEES 50~8000CY 2DB 2 pieces It has a US Navy mark, so I believe it was a transformer used by the US Navy. (I can't say for sure, so please let me know if you have more information.) It's a matching transformer, but I think it can be used as an Ortofon transformer. However, the step-up ratio is probably low, so I'm looking for someone who can build their own amplifier to purchase it. American military transformers are reputed to have powerful sound and good resolution. Size: Diameter: Approximately 44mm, Height (excluding terminals): Approximately 59mm, Bottom mounting section: 46mm x 46mm Weight: Approximately 325g ☆ It has been demagnetized, so you can use it with confidence. ☆ Please refrain from purchasing if you are looking for perfection or are overly sensitive. ☆ Promise: We will ship within 24 hours of confirming payment. We will contact you if there is a delay in shipping.