Found stamped into a silver label at the top of the handle.
Printed twice on the top of the chassis.
Printed on the top corner of the chassis.
overall: 9 1/4 in x 5 1/4 in x 1 1/2 in
The record contains a Whirlwind I FF MOD II, MTC module, with two vacuum tubes, type 0258, attached to a chassis. The chassis has a handle at the top. At the bottom of the module there is a male connector. On either side of the chassis are two spring locking metal screws attached to brackets. Contained within the chassis are six phenolic boards with various components soldered on. There is a red "+" label on the top of the chassis.