VINTAGE BRASS SPURS WITH LEATHER STRAPS. BONUS: SPUR, NO STRAP

Description

I know nothing about spurs. These were my husband's from horse shows he did in the 1950's.
The spurs are brass.  They have some discoloration, green spots, as I did not try to clean them...and thought it best to leave the nice patina.
The pair with straps don't seem to be an exact match as the buckles and leather appear to be a slightly different weight and texture.
The leather straps are not in good shape.
I doubt they are even threaded correctly. (sigh)
Followed other listings for the pictures.  Showed tops, bottoms, side for each.  I don't understand the sizing but hope pictures will be helpful.
Please email with any questions or concerns...I can always send more pictures but as I said, my knowledge is zilch.
Thanks for taking a look.