US-American mastering and lacquer cutting engineer. Co-owner of [l193301]. His etched initials in lacquers usually are made with simple block lettering (see images). Etchings which appear to have the S and G combined into one character are often actually JG, and indicate Joe Gastwirt (usually with a heart) or Jack Hunt with partner Gary (without a heart).

Runout signature can often be misread as SC due to the small size of the etch.