has been hallmarking

• present perfect progressive

  present perfect progressive

  Used to describe an action that began in the past, has continued continuously, and is still in progress.

  of hallmark (3rd person singular).
  hallmark

  noun

  an official mark or stamp indicating a standard of purity, used in marking gold and silver articles assayed by the Goldsmiths' Company of London; plate mark.

Related Words

• indication
• trademark