Those numbers are likely the serial numbers for the saddle. After searching I was unable to find a saddle with those particular numbers, but it should be possible to contact the saddle maker through their website. You can provide pictures and the numbers and they would be able to tell you what make and model the saddle is and a range of value. If their company website is of no use you could also try a saddler or tack shop that specializes in that make of saddle.
A latigo is a tie strap on a western saddle. You can call it a tie strap or a latigo.
whip.
Its a strap that secures the cinch to the saddle.
The cast of Mayor latigo - 1991 includes: Marianne de la Riva Eddie Garcia Michael Villanueva
The cast of Luis Latigo - 1961 includes: Robert Campos Pancho Magalona Charito Solis Luz Valdez
The cast of El latigo contra las momias asesinas - 1980 includes: Marco de Carlo Leopoldo Guerrero Manuel Leal Alfonso Milian Juan Miranda as El Latigo
Tin Hoss - 1925 was released on: USA: July 1925
The cast of The Road from Latigo - 1925 includes: Edmund Cobb as Jerry Donovan Don Coleman as Cowboy Frank Ellis as Cowboy
Horn,pommel,swell,seat,cantle,rear jockey, concho, saddle strings, fender, rear cinch strap, stirrup, long latigo, cinch, short latigo (offside billet), seat jockey, latigo keeper, and gullet.
The Latigo. Western saddles use a cinch and a latigo (or cinch strap) to secure the saddle to the horse. The latigo is attached to the cinch by one of two methods: tying a cinch knot or buckling the cinch.
K R Tools 2301 Latigo Ave. Orlando Ca. 93030
The cast of Lure of Gold - 1922 includes: Ben Corbett as Latigo Bob Hazel Deane as The Singer Neal Hart as Jack Austin William Quinn as Chuck Wallace