1970's Vangaurd Aluminum Valve Cover

Vintage Alloy Valve cover, bolt-on, heavy duty, (was)polished aluminum with black wrinkle finish. Odd or rare,(your call) haven't seen another of these since we picked this one up 10 years ago. Looks well made but, can't verify it won't weep out of the stud holes or, how well it'd seal. Besides, we've only got this one. Does make an interesting conversation piece though, eh?