This is Pu Jie's seal.
Pujie Aisingiorro, Manchu, was the half-brother of Aisin Giorro Puyi, the last emperor of the Qing Dynasty.
The seal is seal script: Pu Jie Aisingiorro+Manchu.
Pu Jie received strict basic calligraphy training since childhood. He was a beginner in Shinan and was influenced by his teacher Zhao.
And it is self-contained, and the show is refreshing and graceful. Before his death, he was honorary director of China Calligraphers Association and vice chairman of the National People's Congress Ethnic Committee.
His calligraphy works have great room for appreciation.
But judging from your photos, you can't tell the truth from the truth. This should be based on the conclusions of professional appraisal institutions or experts.
I hope the answer can help you.