This is for a Vintage Silvine Sidewinder 12 Volt Solid State Regulated Power Converter Cat-003. Plug is marked Silvine with Cat No. 003. Box is marked Sidewinder and CB. Purchased with a bunch of electric trains and electric train items. Can’t guarantee that’s what it’s for but was able to find Silvine electric train controls. I have plugged it in and the red light comes on. It has not been tested beyond that. For that reason It is being sold as is for parts or repair. Measures approximately 7”x4”x3.5”.

Please see pictures for full description and let me know if you have any questions or would like additional pictures before bidding. Thank you