Golf club head

A golf club head, comprising:

• a body having a sole portion, a top portion, a heel portion, a toe portion, a rear portion, a front portion, and a center of gravity located vertically 16-23 mm above a horizontal ground plane, wherein:
• the front portion includes a milled planar strike face having a plurality of primary grooves, and a plurality of auxiliary grooves located between the primary grooves and above a highest primary groove;
• each of the plurality of primary grooves has a primary groove surface area, a most-toeward end, and a most-heelward end;
• the milled planar strike face is formed of oxidizable metal material and at least a portion of the oxidizable metal material is not plated including all of the primary grooves and all of the area between adjacent primary grooves, thereby defining an oxidizable strike face surface area that excludes the primary groove surface area;
• the milled planar strike face has a total milled planar strike face surface area that excludes the primary groove surface area,
• a transition from the milled planar strike face to a curved transition region defines an imaginary par line on the front portion;
• the body has a total volume that excludes the portion of the heel portion that is heelward of the imaginary par line;
• the body has a total surface area that excludes (a) the portion of the heel portion that is heelward of the imaginary par line, and (b) the primary groove surface area;
• a first oxidation-prevention coating permanently covers at least a portion of the body including at least a portion of the rear portion and the heel portion;
• a temporary user-removable cover over at least a portion of the oxidizable strike face surface area, wherein the temporary user-removable cover obscures the view of at least a portion of the plurality of primary grooves;
• a ratio of the oxidizable strike face surface area divided by the total volume is 0.05-0.12 per mm;
• a ratio of the oxidizable strike face surface area divided by the total milled planar strike face surface area is at least 0.70;
• and
• a ratio of the oxidizable strike face surface area divided by the total surface area is 0.25-0.40.

A golf club head, comprising:

• a body having a sole portion, a top portion, a heel portion, a toe portion, a rear portion, and a front portion, wherein:
• the front portion includes a milled planar strike face having a loft of 45 degrees or more, and:
• a plurality of primary grooves with each of the plurality of primary grooves having a most-toeward end and a most-heelward end, and the most-toeward end of at least two of the plurality of primary grooves are not vertically aligned;
• a plurality of auxiliary grooves located between the primary grooves, above a highest primary groove, and between a most-toeward point on the milled planar strike face and the most-toeward end of a longest primary groove, wherein a portion of the plurality of auxiliary grooves for a pattern of parallel straight auxiliary grooves;
• the milled planar strike face is formed of oxidizable metal substrate and at least a portion of the oxidizable metal substrate is not plated including all of the primary grooves and all of the area between adjacent primary grooves;
• a transition from the milled planar strike face to a curved transition region defines an imaginary par line on the front portion;
• a first oxidation-prevention coating permanently covers at least a portion of the body including at least a portion of the rear portion and a majority of the body heelward of the imaginary par line;
• a temporary user-removable cover over majority of the oxidizable metal substrate, wherein:
• the temporary user-removable cover obscures the view of at least a portion of the plurality of primary grooves and at least a portion of the plurality of auxiliary grooves;
• the temporary user-removable cover is formed with an opening to display a portion of the milled planar strike face, a portion of the plurality of primary grooves, and a portion of the plurality of auxiliary grooves;
• the temporary user-removable cover includes a non-stick tab coupled to a periphery of the temporary user-removable cover;
• the temporary user-removable cover includes informational indicia;
• and
• an external layer of plastic-based shrink wrap coving at least a portion of the body and the temporary user-removable cover.