Exhibit 4.2.1

AMENDMENT NO. 1 TO THE

AMENDED AND RESTATED

DECLARATION OF TRUST AND TRUST AGREEMENT

OF

DB
G10 CURRENCY HARVEST MASTER FUND

This Amendment No. 1 (Amendment No. 1) to the Amended and
Restated Declaration of Trust and Trust Agreement, dated as of September 12, 2006 (the Declaration of Trust), of DB G10 Currency Harvest Master Fund (the Fund) by and between DB Commodity Services LLC (the
Managing Owner) and Wilmington Trust Company.

WHEREAS, the Managing Owner has deemed it advisable
for the Fund to amend the Declaration of Trust to memorialize changes in certain allocation provisions disclosed in the Declaration of Trust as previously agreed to by the Fund and the Managing Owner;

WHEREAS, the Managing Owner wishes to amend the Declaration of Trust pursuant to Section 11.1(b)(iii) thereof to give effect
to the foregoing.

NOW, THEREFORE, in consideration of the premises and of other good and valuable consideration, the
receipt and sufficiency of all of which are hereby acknowledged, the Declaration of Trust is amended as follows:



| | 1. | Section 6.3 of the Declaration of Trust shall be amended and replaced in its entirety as follows:
| | -- | -------------------------------------------------------------------------------------------------

SECTION 6.3 Daily Allocations. All allocations to Shareholders of items included within the Trusts
Profits and Losses attributable daily shall be allocated solely among the Shareholders recognized as shareholders as of the close of business each Business Day, as follows:

(a) For purposes of maintaining the Capital Accounts and in determining the rights of the Shareholders among themselves,
except as otherwise provided in this Article VI, each item of income, gain, loss and deduction shall be allocated among Shareholders in accordance with their respective Percentage Interests.

(b) Any item of loss or deduction otherwise allocated to the Managing Owner pursuant to Section 6.3(a) which is in
excess of such Managing Owners positive Adjusted Capital Account balance (following adjustment to reflect the allocation of all other items for such period) shall instead be allocated to the other Shareholders in accordance with their
respective Percentage Interests to the extent such item of loss or deduction exceeds such Managing Owners Adjusted Capital Account balance; provided that the allocation of any such item to such other Shareholders shall only be made hereunder
to the extent the allocation would not result in or increase a negative balance in the Adjusted Capital Account of such other Shareholder. If such an allocation occurs, items of income or gain that would otherwise be allocated to the Managing Owner
equal to the amount of such allocated loss or deduction will be allocated to the other Shareholders in accordance with their Percentage Interests as quickly as possible.



---

(c) If any Shareholder unexpectedly receives any adjustments, allocations or
distributions described in Treasury Regulation sections 1.704-1(b)(ii)(d)(4), (5) or (6), items of Trust income and gain shall be specially allocated to such Shareholder in an amount and manner sufficient to eliminate a deficit in its Adjusted
Capital Account created by such adjustments, allocations or distributions as quickly as possible. This section 6.3(c) is intended to constitute a qualified income offset within the meaning of Treasury Regulation section
1.704-1(b)(2)(ii)(d).

(d) Notwithstanding any other provision of this Trust Agreement, upon or prior to the
issuance of additional Shares, the Managing Owner shall have the sole and complete discretion, without the approval of any other Shareholder, to amend any provision of this Article VI in any manner, as is necessary, appropriate or advisable to
comply with any current or future provisions of the Code or the Treasury Regulations or to implement the terms and conditions of any Shares.



| | 2. | This Amendment No. 1 to the Declaration of Trust shall be governed by, and construed in accordance with, the laws of the State of Delaware.
| | -- | -------------------------------------------------------------------------------------------------------------------------------------------

Remainder of page left blank intentionally.



2



---

IN WITNESS WHEREOF, this Amendment No. 1 has been executed
for and on behalf of the undersigned as of the 26thday of
December, 2007.



DB COMMODITY SERVICES LLC,
as Managing OwnerBy:

/s/ Kevin RichName:

Kevin RichTitle:

Director and Chief
Executive OfficerBy:

/s/ Gregory CollettName:

Gregory CollettTitle:

Chief Operating Officer


Acknowledged:

WILMINGTON TRUST COMPANY, not in its

individual capacity but solely as Trustee

of
the Fund



|    |  |                     |  |                         
|--- |  | ------------------- |  | ------------------------
|    | 
|By: |  | /s/ James A. Hanley
|    |  | Name:               |  | James A. Hanley         
|    |  | Title:              |  | Assistant Vice President



3