I bought these over 10 years ago ,from a collector here in NM. 

I was told these were 1950's but feel good saying they likely from  the 70's ? . 

 They came with the labels on bottom as photographed .

 The larger sculpture is 17.5 inches high & has "Roberti" on its bottom label..

  The shorter sculpture "Andersoni" on bottom label  13.5" inches high, both have  labels on their bases ..both are approx. 6" deep . 

 Tanzania has a large Mokonde population,that migrated from Mozambique in 1920's .. 

 For better understanding of these go view similar carvings on 1st dibs website .. they also have examples like these , that explain history of Mokonde art , specifically this style of older ironwood carvings sculptures. I had a older book on Mokonde wood sculptures,but yet can't find it in my thousands of books ugh! 

Please feel free to ask any and all questions... 

   Anyways , take a close look n good luck .

 Thank You

  John