BOLIVIA. Cob 4 Reales, 1652-P. Potosi Mint, Assayer Antonia de Ergueta (E). Philip IV. PCGS VF-30.KM-B18; Cal-1111; Mastalir-1-B.ca. Weight: 13.52 gms. A <strong>RARE</strong> transitional 4 Reales piece of striking beauty. The obverse offers clear details in all nine fields of its central devices. On the reverse, the castles and lions are well-presented within their quadrants, with a complete three-digit date below. On the right, a bold assayers initial flanks the full name and ordinal of the monarch on the outer legend. The coin is struck on a somewhat compact planchet of outstanding metal quality, with attractive gunmetal gray toning and darker patina surrounding the devices, giving the details added emphasis. This problem-free example of this short-lived design is rarely offered so wholesome and appealing; the next collector to add the coin to their collection is sure to be pleased.<strong>To view all items from the Pat Johnson Collection, click <a href="https://auctions.stacksbowers.com/lots?sort=auction_date_lot_number_asc&search=From+the+Pat+Johnson&limit=96&parent_category=1-11EIV&lots_range=upcoming"> here.</a></strong>From the Pat Johnson Collection.<p>