Hi R, that was a nice one.
The Neybar N-1 from Uruguay by Messrs. Moll, Barrandeguy and Neyedorff and built by the Barrandeguy-Neyedorff company (hence Neybar N-1). It had a retractable u/c and on your next visit you can see it at the Museo Aeronautica in Montevideo.
If correct, OH please