Bigsby bridges boast a unique design and high durability, making them ideal for electric guitars. - Brand: Bigsby Tremolo Unit ■ Original Kalamazoo Series ■ B6 Type ■ Specifications ・ Manufacturing Method: Sand Cast ・ Material: Aluminum - Model Number: No. D169,120 - Type: Full Acoustic, Semi-Acoustic Bridge Missing mounting screws, tension spring, and nut. Thank you for viewing.