Mine is 1866. Mostly have issues with front cam. Just because I do not use rear one. The issue appears in Zoom, Skype and other meeting apps
1866 is the model number, not the LOT number (all Pro 7 i5 8GB 128GB models are model 1866). The LOT number is on the same sticker on the underside of your box, but a bit further down and a little smaller. It says LOT: XXXX with XXXX being the LOT number.