You may be thinking of the PD300. It had avacuum device to suck the record to the platter,thus flatttening the record and creating abetter bond. In the PD 300 and 310 the vacuum was manually created and in the flagship PD555 electrically. Luxman pioneered this system that was later adopted by SOTA and others.
Most Luxman turntables were made by Micro Seiki,some actually saying that at the back and others using a code used by the Japanese denoting who was the OEM.