For DVD:
Title: Son of a Gunfighter (on print) El Hijo del Pistolero (on box and DVD menu)
Country: Spain
Region: 0
Releasing Studio: Unclear - Amazon says MGM
Case Type: Standard
Aspect Ratio: 2.35:1
Anamorphic?: 16/9
PAL or NTSC?: Pal
Soundtracks: English Dolby Digital Stereo, Spanish Dolby Digital Stereo
Subtitles (are they optional?): Optional - Spanish, Portuguese
Cuts: (and if you know it, precise run time) No cuts 87m52s (Pal - so 92m NTSC). Note that box says running time is 85m but that is wrong.
Commentaries: None
Extras: None
Notes: English print with English credits. Also released in R0 by Warner Archive (USA) and this is probably same print.
Easter Eggs: None
Amazon ASIN (UK, French, German, USA releases only): N/A - Spanish
Source:* I own it