OverviewThe SL-HF300 was the first USA NTSC machine to have the HF prefix. It had the auto play feature, a 7-day, 6-event timer and was available in silver and black. It is now fairly easy find on the used market. When it was current, it retailed for approximately $1000 new, and was introduced in 1984. Its big brother was the HF500.
Many thanks to Marcus Voyles for info and pictures on this model