Hi - From your blog, I understand this is a custom balance. The window is a non-tilt window. The metal bar is 27 7/8 inches long and 1/2 inch width. The top has an angle on it and side tabs.
I'm not sure how to measure the shoe. The very widest point of the shoes is approximately 1 1/8 inches. It also has side tabs
The stamp on the metal bar is 2730 BSI VO
Thank you for your help. Please let me know if you need additional pictures or information.
Ruth