USPS changed its manufacturer of  postal security device (PSD) within SSK from Stamps.com (06 2S) to Pitney Bowes (02 6W) in mid-Feb 2023. In some kiosk, the postal clerk used old flag ATM (CPV91) for a short time. Here offers a pair of single Old flag ATM with IMI code and 1 NOT For Postage label.

Buyers pay $1 within US or $2 worldwide at buyer's risk. $4 for tracked shipping in US. Insured or registered mail is optional with additional cost. Registered airmail will add $16 for international buyers. You are agreed to take the risk of lost mail if you do not select tracking/insurance/registration. Insurance or registration is required for invoice at $100 or above unless agreement reached with buyer. Will combine shipping.