The early 50 1974 "SACO" imports that are in good condition and have the old style "SF" marked grip frame housings can bring a premium and are very desirable among H&K collectors.
ðɪ ˈɜːli fˈɪfti nˈaɪntiːnhˈʌndɹɪd sˈɛvənti fˈoːɹ "sˈɑːkoʊ" ɪmpˈoːɹts ðæt ɑːɹ ɪn ɡˈʊd kəndˈɪʃən ænd hæv ðɪ ˈoʊld stˈaɪl "ˌɛsˈɛf" mˈɑːɹkt ɡɹˈɪp fɹˈeɪm hˈaʊzɪŋz kæn bɹˈɪŋ ɐ pɹˈiːmiəm ænd ɑːɹ vˈɛɹi dɪzˈaɪɚɹəbəl ɐmˌʌŋ ˈeɪtʃ ænd kˈeɪ kəlˈɛktɚz.