Atari custom chip 137419-102 a POKEY??

According to the Atari Approved Vendor List
it is a custom "line buffer / counter" by NCR

137419-101 IC,Graphics_Priority_Controller,Custom NCR By Description
137419-102 IC,Line_Buffer_Counter,Custom NCR By Description
137419-103 IC,Sync_Generator,Custom NCR By Description
137419-104 IC,Playfield_Horiz_Scroll_Control,Custom NCR By Description
 
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