Can someone help me identify this brake booster from the pics attached?
I need a replacement and desire a part number, name or source. Thanks in advance for the effort.
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do not know the model but I have one spare..if you are in Europe 
did buy a new one assuming the old was broken but I only missed the seal toward the brake master..so no vacuum..an expensive endevour..
Mat from Germany
John,
That looks like the GM booster that Bobby Byars used to sell. Pic below is from his website. Try checking with his brother Don.
John
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Thanks Matt, However, I am in TX.
John, It sure looks like what Bobby offered. Many of the vendors offered the same options. Hopefully another has one as well. Thanks
I would be interested to know a pn or application for the master cylinder shown.
I have a GM master but the forward reservoir is just a bit tall.
If that booster system is from the Byars Bros, it is a modified GM booster (unidentified model) and master cylinder. GMs all used a 3-stud attachment to the firewall and Byars changed that to 4-stud to bolt into a Pantera, then gold-alodined the assembly. The booster can is slightly larger than a stock Bendix-Italia booster for a Pantera.
The aluminum MC is a dual-bore GM type with the front circuit having a larger piston than the rear. There is a stock built-in 2-psi keep-alive valve in the front outlet to improve pedal response. Don Byars could give you more specifics.
If you cannot find a replacement you can contact White Post Restorations and have them rebuild it for you. They did a great job on my Tiger brake components.
Thanks everyone for your suggestions. I spoke with Don Byers at Full Throttle Panteras and he was familiar with the assembly. I will be sending the Booster back to them. The vendor that supplied them with the part will refurbish the unit. A more economical approach than the cost of a replacement.