A late Qing/early ROC period, Zisha teapot in 140ml. I am using the term Zisha as the clay on antiques is often a blend of several clays, in this case a Zisha/Zini kind of clay.
Firing seems to be medium. Did well with roasted Oolong and Hongcha (haven't tried others). For those who are thinking it might be too large, I want to add that with this shape it is good practice to not fill up to the brim anyways, so a working-volume of 100-120ml is more reasonable.
As usual for teapots of this period, the lid does not fit perfectly, which does not impede the performance of it. Tear and wear as appropriate for an antique. Inside has some tool marks. Thoroughly cleaned and reset. No visible cracks (be careful when first using, old teapots need to slowly be woken up! Always warm from the outside first, preferably the bottom of the pot).
This teapot is to the best of knowledge from the late Qing/early ROC period. In addition, I have cross-checked this item with the sources at my disposal. If you consider purchasing, I suppose that have done the same and know what you are doing. Do not buy what you don't understand

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Price: 720$ (payment per paypal in NT 21600)
incl. paypal fees and EMS shipping