I thought I had seen it in Schjoth, but the only reference I can find right away is to a series of incidents in the Ming Dynasty.
(p. 47, under "
Chien-wen, 1399-1402")
Quote:
It is reported that in the time of Yung-Lo (1403-24), all the cash of the Chien-wen period were destroyed. At the same time there is, however, no clear record showing that any Chien-wen coins were cast at all. According to the "Historical Archives" of Ming for the sixth year of Chia-ching (AD 1527) a supplementary issue of coinage (thin and diminutive) was made for the nine year-titles from Chien-wen to Cheng-te, to the extent of one million tings for each year-title, a ting representing five thousand cash.
(p. 48, under "Chia-ching, 1522-66")
Quote:
In the thirty-second year of Chia-ching, a supplementary issue of coins were made, for each of the nine previous year titles after Hung-wu.
(p. 49, under "T'ai-ch'ang, 1620")
Quote:
Though Kuang Tsung ruled but one month, the year of this month was styled T'ai-ch'ang, and as the issue of coins could be but small, the successor, Hsi Tsung, acting with proper dignity, caused a further issue of the T'ai-ch'ang coins to be made during the first year of his reign, T'ien-ch'i, so as to make the mourning people think of their late lord with the more respect.
In this last case, the supplementary coins seem to have been issued with both reign titles, so that the coins read "T'ai-ch'ang T'ien-ch'i" rather than either "T'ai-ch'ang T'ung-pao" or "T'ien-ch'i T'ung-pao".