Svengoolie: War of the Colossal Beast (1958)

 

Directed by Bert I. Gordon. 

https://en.wikipedia.org/wiki/War_of_the_Colossal_Beast 

https://www.dvdtalk.com/dvdsavant/s1895war.html  

https://unobtainium13.com/2015/10/14/horror-on-the-lens-war-of-the-colossal-beast-dir-by-bert-i-gordon/