EXHIBIT 10.11
                                    SPECIMEN

                         Morgan Stanley Spectrum Series

                     Units of Limited Partnership Interest
C                 Additional Subscription Agreement Update Form

                                 April 2, 2007

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             Please print or type (except signatures). Use ink only.

Morgan Stanley & Co. Incorporated Account No.   _ _ _ - _ _ _ _ _ _ - _ _ _

    I am an investor in one or more of the Morgan Stanley Spectrum Series
partnership(s).

    I acknowledge receipt of the Morgan Stanley Spectrum Series Prospectus dated
April 2, 2007 (the "Prospectus") and any applicable supplement to the
Prospectus. I have signed this form, which updates each Subscription and
Exchange Agreement and Power of Attorney I signed when I purchased units in one
or more of the Morgan Stanley Spectrum Series partnership(s), so that I may
purchase additional units of such partnership(s) without the need to execute a
new Subscription Agreement. I understand that if I wish to purchase additional
units by way of an exchange, or if I wish to purchase units of any Morgan
Stanley Spectrum Series partnership in which I am not currently an investor, I
must first execute a new Subscription Agreement in the form annexed to the
applicable Prospectus as Exhibit B.

    I hereby confirm that the representations, warranties and other information
regarding the Subscriber in the Subscription Agreement(s) I previously executed
are still accurate, and that any purchase of additional Units following the date
of this Subscription Agreement Update Form shall be deemed confirmation that
such representations, warranties and other information are still accurate at the
time of that additional purchase. I will notify my Morgan Stanley & Co.
Incorporated Financial Advisor prior to the purchase of additional Units if
there is any material change in the Subscriber's representations, warranties, or
other information contained in the previously executed Subscription
Agreement(s).

    I understand that I will need to execute a new Subscription Agreement Update
Form when a new Prospectus or Prospectus Supplement is issued.

INDIVIDUAL SUBSCRIBERS              IF SUBSCRIBER IS AN ENTITY

X ________________________________  ............................................
Signature of Subscriber             Print Full Name of Entity

..................................  X___________________________________________
Print Full Name of Subscriber        Signature of Person Signing for Entity

X ________________________________  By:.........................................
Signature of Co-Subscriber          Print Full Name of Person Signing for Entity

..................................  ............................................
Print Full Name of Co-Subscriber    Title

......................              ......................
Date:                               Date:

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Financial Advisor and Branch Manager Use Only
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o  We, the undersigned Financial Advisor and Branch Manager, certify that the
   above signature(s) is/are true and correct. If the Subscriber's account is a
   participant-directed ERISA Plan or Individual Retirement Account for which
   Morgan Stanley & Co. Incorporated is custodian, the Branch Manager then
   certifies that the representations set forth under the heading "Entity
   Subscription" of the Subscription Agreement(s) the Subscriber previously
   executed are still accurate.

o  We hereby confirm that at the time of any purchase of additional Units, the
   Subscriber received the Prospectus, any supplement to the Prospectus, and
   current monthly report at least five business days prior to the applicable
   monthly closing.

o  We hereby confirm that at the time of any purchase of additional Units, the
   Subscriber meets the applicable suitability standards under "State
   Suitability Requirements" on page 4 of the Subscription Agreement and any
   applicable supplement to the Prospectus.

X.................................  X...........................................
(Financial Advisor MUST sign)                (Branch Manager MUST sign)

..................................
    (Branch Telephone Number)

    Morgan Stanley & Co. Incorporated Financial Advisor: Please enter a BUY
order upon making additions to an existing position during the life of the
current prospectus, then this Agreement must be forwarded to the general
partner, Attn: Managed Futures, at 522 Fifth Avenue, 13th Floor, New York, New
York 10036. This form cannot be faxed.

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