Section 17. If Such Owner Shall in Writing Accept Said Offer Within

two weeks after the date when the same is mailed to such owner, the Commonwealth or the city shall convey such parcel to such owner on payment of the purchase money to the Commonwealth or the city, as the case may be, within thirty days after the acceptance of the offer. The conveyance shall be by deed, with or without covenants of title and warranty, executed and acknowledged in the name and behalf of the Commonwealth or the city by the officers or board which have or has taken such parcel, or by their or its successors or successor, and may be made subject to such restrictions as the Commonwealth or city may in writing have notified the appraisers or appraiser at the time of their or his appointment would be imposed on such parcel.